import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1265072 part 1. Add GetWindowIfCurrent and GetDocumentIfCurrent helpers to DOMEventTargetHelper. r=smaug (238cf93592)
- Bug 1265072 part 2. Get rid of uses of GetDocumentFromScriptContext in XMLHttpRequest code. r=smaug (263f063149)
- Bug 1265072 part 3. Get rid of the use of GetDocumentFromScriptContext in DOMEventTargetHelper. r=smaug (8dd8dca53d)
- Bug 1265072 part 4. Get rid of uses of GetDocumentFromScriptContext in WebSocket code. r=smaug (be9c18769b)
- Bug 1265072 part 5. Get rid of uses of GetDocumentFromScriptContext in EventSource code. r=smaug (5fbcf73629)
- Bug 1265072 part 6. Get rid of nsContentUtils::GetDocumentFromScriptContext. r=smaug (752aa67986)
- Bug 1258576 part.1 nsContentIterator should give up to find next/previous node if it reached the root node unexpectedly r=smaug (7175ce5477)
- Bug 1230660 - Remove verbose warnings emitted from nsContentIterator. r=smaug (ef0b8a3a4c)
- Bug 1260908 - Fix type of kMinTelemetryMessageSize. r=smaug (8817839277)
- Bug 1209461 - Remove compilation warnings in nsFrameMessageManager, r=smaug (da95cf91ab)
- Bug 1251361 - "Assertion failure: cache->PreservingWrapper()" with <marquee>, navigation, adoptNode. r=smaug. (630cff1943)
- Bug 1144204. Stop returning things for non-plug-in MIME types from the navigator.mimeTypes getter. r=smaug (329eac72b1)
- Bug 1150709 - Add mForceContentDispatch to nsInProcessTabChildGlobal (r=smaug) (d7e2887457)
- Bug 233705 - remove mDontWrapAnyQuotes, mWrapToWindow and pref wrap_to_window_width. r=ehsan (c7e98bc307)
- Bug 1105556 - nsPerformance::CheckAllowedOrigin should return early for TYPE_DOCUMENT loads. TYPE_DOCUMENT loads don't go through a TimingAllowedCheck(). r=bz, vgosu (5da5530caf)
- Bug 1241183 - Make nsScriptLoadRequest non-threadsafe now it's no longer used as a context for network loads r=sicking (206d763af8)
- Bug 962251 - Add relatedTarget in FocusEvent, r=smaug (f66018e5a4)
- Bug 1248806 - Splitting out protocol handlers from nsLayoutModule. r=bholley (572243ca92)
- Bug 1256488 - Use Base64 URL-encoding in CryptoBuffer. r=ttaubert (9d28ca5f9c)
- Bug 1243311 - Add structured cloning tests for CryptoKeys r=rbarnes (5cde35d811)
- Bug 842818 - Enable structured cloning for CryptoKeys across threads r=baku,keeler (8863b23dc3)
- Bug 1257325 - Silence VS2015 compiler warnings in CryptoKey.cpp f=gps r=rbarnes (0d93bdc950)
- Bug 1188750 - Add test to ensure NSS is initialized before the WebCrypto API tries to deserialize a key f=keeler r=khuey (8d08363e2c)
- Bug 842818 - Run WebCrypto tests in Workers r=mt,rbarnes (48477dfeb4)
- Bug 1205177 - call fileHandleQueue->Finish if aFinish in FileHandleThreadPool::Enqueue. r=janv (f5d6737f27)
- Bug 1206166 - Move FetchUtil::Consume methods into separate BodyUtil class and update Fetch.cpp and ServiceWorkerEvents.cpp accordingly. r=kitcambridge (967f2f58e1)
- Bug 1250930 - Use SubtleCrypto's global when creating keys for an ImportKeyTask r=bz (6227fb14b3)
- Bug 1250930 - Use correct global when creating a key in GenerateSymmetricKeyTask r=bz (92d7faa773)
- Bug 1240436 - Part1: Convert UTF16 to UTF8 before generating nsStringInputStream. r=khuey (1919accaf8)
- Bug 1240436 - Part2: Lossy convert UTF16 to ASCII before generating nsStringInputStream. r=mayhemer (03aa1b6dbe)
- Bug 1240436 - Part3: Remove NS_NewStringInputStream to prevent misuse. r=froydnj (cff40c1b2e)
- Bug 1263405 - Some headers missing in dom/base, r=smaug (12043c5368)
- Bug 964583 - Revert Web IDL [EnforceRange] (unsigned) long long boundary conditions to match ES6. r=bz (6e235bb6b7)
- Bug 1260838 - Assert that ScriptSource's reference count is zero upon destruction; r=jimb a=kwierso (8455465c92)
- Bug 1257164 - Check for interrupts in a few loops in JSON.stringify to eliminate feedback-less hangs. r=evilpie (dbe1336aa8)
- Bug 837192 followup: In js::FunctionToString, fold variable into its only remaining usage-site (an assertion) to fix opt Werror build failures. rs=Waldo (e6b4f52d6a)
- Bug 1258436 - Remove GC suppression in JSFunction::createScriptForLazilyInterpretedFunction. r=sfink (206023942d)
- Declare and define ExecutableAllocator::reprotectRegion only #ifdef NON_WRITABLE_JIT_CODE, to eliminate MOZ_ASSERT of a constant condition that makes some compilers warn. No bug, r=efaust over IRC (5a4d3ab11b)
- Bug 1254369 - IonMonkey: MIPS: Fix ma_b(Register, Imm32, wasm::JumpTarget) missing. r=arai (2f906fec70)
- Bug 1256502 - Use a uint32_t cast to avoid C4319 on VS2015; r=botond (93ba380002)
- Bug 1236043 - Use TiledRegion for the invalid region of a layer. r=jrmuizel (37b87bc355)
- Bug 1248044 - Add PingPongRegion for faster region operations for 2x memory usage. r=jrmuizel (fbd73fb879)
- Bug 1236043 - Add a TiledRegion class. r=jrmuizel (3056f641a4)
- Bug 1116473 - [3.2] Use RefPtr for AndroidSurfaceTexture references. r=snorp (c6e80d0d84)
- Bug 1116473 - [1.1] Handle AndroidSurfaceTexture mapping in thread-safe class. r=snorp (ee8b1d0736)
- Bug 1116473 - [2.1] Const-correctness fixes. r=snorp (5f5fb8fbc4)
- Bug 1251163 - Clear android surface texture before widget shutdown, r=nical (b71d849297)
- Bug 1245813 - Make TextureHost bullet-proof against changing its compositor. r=dvander (b0ef2492fc)
- Recreate GLTextureSources after changing compositors on Mac. (bug 1247611, r=mattwoodrow) (26bd0e69aa)
- Bug 1258768 - Check compositor backends before casting. r=dvander (98929ca492)
- Bug 1245813 - Fix a trivial inverted null check in TextureHostOGL.cpp. r=me (956cfd2e5c)
- Bug 1245813 - Add a missing parenthesis on NS_SUCCEEDED, on a CLOSED TREE. (8e13cc3e1b)
- Bug 1262601 - Handle video content as opaque in PostProcessLayers() r=mattwoodrow (ba578d7394)
- Bug 1258768 - Remove the remaining unsafe compositor casts. r=dvander (8ec58c0ce8)
- Bug 1229946 - report GL_ARB_texture_rg extension to SkiaGL to avoid using GL_ALPHA render targets. r=jgilbert (cf0f3a9fec)
- Bug 1238541 - Don't die in SharedSurface_EGLImage::ProducerReadReleaseImpl() if there is an existing fence r=jgilbert (c1ea4891f7)
- Bug 1240806 - Remove some dead code in GLContextProviderEGL. r=jgilbert (40484e9039)
- Bug 1258094 - Use SurfaceFormat::B8G8R8A8 as back buffer surface r=jrmuizel (cec7a31ffd)
- Bug 1254897 - Recycle back buffer in BasicCompositor r=jrmuizel (0359698b68)

dom/base/nsFrameMessageManager.cpp

@@ -69,7 +69,7 @@ using namespace mozilla;
 using namespace mozilla::dom;
 using namespace mozilla::dom::ipc;
 
-static const int kMinTelemetryMessageSize = 8192;
+static const size_t kMinTelemetryMessageSize = 8192;
 
 nsFrameMessageManager::nsFrameMessageManager(mozilla::dom::ipc::MessageManagerCallback* aCallback,
                                              nsFrameMessageManager* aParentManager,
@@ -1799,25 +1799,21 @@ nsMessageManagerScriptExecutor::TryCacheLoadAndCompileScript(
       if (!JS::Compile(cx, options, srcBuf, &script)) {
         return;
       }
-    } else {
-      // We're going to run these against some non-global scope.
-      if (!JS::CompileForNonSyntacticScope(cx, options, srcBuf, &script)) {
-        return;
-      }
+    // We're going to run these against some non-global scope.
+    } else if (!JS::CompileForNonSyntacticScope(cx, options, srcBuf, &script)) {
+      return;
     }
 
+    MOZ_ASSERT(script);
     aScriptp.set(script);
 
     nsAutoCString scheme;
     uri->GetScheme(scheme);
     // We don't cache data: scripts!
     if (aShouldCache && !scheme.EqualsLiteral("data")) {
-      nsMessageManagerScriptHolder* holder;
-
       // Root the object also for caching.
-      if (script) {
-        holder = new nsMessageManagerScriptHolder(cx, script, aRunInGlobalScope);
-      }
+      nsMessageManagerScriptHolder* holder =
+        new nsMessageManagerScriptHolder(cx, script, aRunInGlobalScope);
       sCachedScripts->Put(aURL, holder);
     }
   }