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

- Bug 1164268 - Add some logging to browser_perf-compatibility-05.js, r=me (55c0ed222)
- Bug 1166126 - Increase the size of the tag buffer in the profiler. r=mstange (cabe3d690)
- Bug 1159486 - Make profiler use the process creation time. r=shu, r=jsantell (4e285c7db)
- correctly apply Bug 1287912. r=bz (66644beac)
- Bug 1187386 (Part 7) - Eliminate remaining dependencies on a non-null mImage in Decoder. r=tn (b1e3861b6)
- Bug 1179451 - Part 1: Rewrite some ternary operators as if/else. r=froydnj (a46f4508f)
- Bug 1179451 - Part 2: Fix incorrect return type. r=ehsan (a68ef3d67)
- Bug 1179451 - Part 3: Use .get() to assign nsRefPtrs to raw pointers. r=froydnj (59155974f)
- Bug 1179451 - Part 4: Don't pass nsRefPtr&& to functions that want raw pointers. r=froydnj (2a7893a33)
- Bug 1179451 - Part 5: Delete nsRefPtr<T>::operator T*()&&. r=froydnj (891e019b0)

toolkit/devtools/server/actors/profiler.js

@@ -99,6 +99,10 @@ ProfilerActor.prototype = {
       threadFilters: request.threadFilters || DEFAULT_PROFILER_OPTIONS.threadFilters,
     };
 
+    // The start time should be before any samples we might be
+    // interested in.
+    let currentTime = nsIProfilerModule.getElapsedTime();
+
     nsIProfilerModule.StartProfiler(
       options.entries,
       options.interval,
@@ -109,7 +113,7 @@ ProfilerActor.prototype = {
     );
     let { position, totalSize, generation } = this.onGetBufferInfo();
 
-    return { started: true, position, totalSize, generation };
+    return { started: true, position, totalSize, generation, currentTime };
   },
 
   /**