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

- bug 1215748 - use llvm-dsymutil for mac builds. r=mshal (a217006d89)
- warnings (31ea43d0d8)
- Bug 1175154 - Unit tests for IAC on 3.0. r=ferjm (12c424bab3)
- Bug 1219543 - Part 1: isRunningOnCompositor flag is now a member of AnimationProperty. r=bbirtles (85bc668501)
- Bug 1219543 - Part 2: Avoid the period that mIsRunningOnCompositor is false between restyling and building display list. r=bbirtles (597e46d479)
- Bug 1219543 - Part 3: MutationObserver should disconnect when the test is finished. r=bbirtles (70c26a266e)
- Bug 1214148 - patch 1 - propagation from the nested iframe back to the toplevel iframe, r=alwu (b42002f43a)
- Bug 1214148 - patch 2 - from toplevel iframe to the nested iframe, r=alwu (7b07fe5399)
- Bug 1214148 - patch 3 - correct window for nested iframes, r=alwu (27ee08caf1)
- Bug 1166910 - put referrer attribute behind pref in webidl, r=bz (93e421fa1b)
- Bug 1187357 - rename referrer attribute to referrerpolicy. r=hsivonen (70c67f5def)
- Bug 1187357 - Generated code for renaming referrer to referrerpolicy in html parser. r=hsivonen (738de3f278)
- Bug 1221341. Snap box shadow clip rect to device pixels. r=mstange (b63b783714)
- Bug 1228634 - Implement Element.getAttributeNames, r=peterv (4594d9c14c)
- Bug 1216193. Implement webkitMatchesSelector. r=khuey (39742b7e0b)
- Bug 1134648, handle dynamic changes to rel=dns-prefetch, r=bz (e27638080e)
- Bug 1229962 - use UniquePtr<T[]> instead of nsAutoArrayPtr<T> in parser/html/; r=hsivonen (75de6314f1)
- Bug 1226437 - Speculative CSP should set speculative referrer policy instead of actual referrer policy. r=sicking (f7dfd3fd18)
- Bug 1227554 - Default to NullPrincipal if doc is not available within expatdriver. r=bz (336a562965)
- Bug 1215781 - Use MOZ_UTF16 to generate sTagUnicodeTable. r=mrbkap (eca371a36b)
- Bug 1082598 - Part 5: Fix NPAPI for Skia update. r=jrmuizel (25c4d080ab)
- Bug 1183828 - Remove 'nsWindow::GetNativeData not implemented for this type' warning. r=roc (0a60404b57)
- Bug 1224445 - Add NS_NATIVE_OPENGL_CONTEXT handling to nsWindow::GetNativeData() r=mwu (ee35844be4)
- Bug 1179632 part.1 native IME context should not be stored in InputContext but should be able to retrieve with nsIWidget::GetNativeData() r=smaug (5f1804bb72)
- Bug 1179632 part.2 WidgetCompositionEvent should store NativeIMEContext which caused the event and PuppetWidget should store it for GetNativeIMEContext() r=smaug, sr=smaug (e00ca78e3f)
- Bug 1179632 part.3 TabParent::RecvEndIMEComposition() shouldn't return true with aNoCompositionEvent when there is no widget r=smaug (ee065ed491)
- Bug 1179632 part.4 Clean up the code to request IME to commit composition across process boundary r=smaug (9567c4dc57)
- Bug 1179632 part.5 WidgetCompositionEvent::mNativeIMEContext should be used at looking for a TextComposition instance for a WidgetCompositionEvent r=smaug (f4e27ec28c)
- Bug 1179632 part.6 KeyboardEvent.isComposing shouldn't expose IME state on different document r=smaug (ca8b8a6a02)
- Bug 1227544 - Scaling on 720p devices is broken. r=timdream (cb89af839f)

dom/base/nsFrameLoader.cpp

@@ -417,7 +417,7 @@ nsFrameLoader::ReallyStartLoadingInternal()
   net::ReferrerPolicy referrerPolicy = mOwnerContent->OwnerDoc()->GetReferrerPolicy();
   HTMLIFrameElement* iframe = HTMLIFrameElement::FromContent(mOwnerContent);
   if (iframe) {
-    net::ReferrerPolicy iframeReferrerPolicy = iframe->GetReferrerPolicy();
+    net::ReferrerPolicy iframeReferrerPolicy = iframe->GetReferrerPolicyAsEnum();
     if (iframeReferrerPolicy != net::RP_Unset) {
       referrerPolicy = iframeReferrerPolicy;
     }