Make event names of TRACE_EVENT_SAMPLING_STATE macros more descriptive

Source/bindings/v8/V8GCController.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 314 matching lines @@
         minorGCPrologue(isolate);
     else if (type == v8::kGCTypeMarkSweepCompact)
         majorGCPrologue(flags & v8::kGCCallbackFlagConstructRetainedObjectInfos, isolate);
 }
 
 void V8GCController::minorGCPrologue(v8::Isolate* isolate)
 {
     TRACE_EVENT_BEGIN0("v8", "minorGC");
     if (isMainThread()) {
         {
-            TRACE_EVENT_SCOPED_SAMPLING_STATE("Blink", "MinorGC");
+            TRACE_EVENT_SCOPED_SAMPLING_STATE("Blink", "DOMMinorGC");
             v8::HandleScope scope(isolate);
             MinorGCWrapperVisitor visitor(isolate);
             v8::V8::VisitHandlesForPartialDependence(isolate, &visitor);
             visitor.notifyFinished();
         }
         V8PerIsolateData::from(isolate)->setPreviousSamplingState(TRACE_EVENT_GET_SAMPLING_STATE());
-        TRACE_EVENT_SET_SAMPLING_STATE("V8", "MinorGC");
+        TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8MinorGC");
     }
 }
 
 // Create object groups for DOM tree nodes.
 void V8GCController::majorGCPrologue(bool constructRetainedObjectInfos, v8::Isolate* isolate)
 {
     v8::HandleScope scope(isolate);
     TRACE_EVENT_BEGIN0("v8", "majorGC");
     if (isMainThread()) {
         {
-            TRACE_EVENT_SCOPED_SAMPLING_STATE("Blink", "MajorGC");
+            TRACE_EVENT_SCOPED_SAMPLING_STATE("Blink", "DOMMajorGC");
             MajorGCWrapperVisitor visitor(isolate, constructRetainedObjectInfos);
             v8::V8::VisitHandlesWithClassIds(&visitor);
             visitor.notifyFinished();
         }
         V8PerIsolateData::from(isolate)->setPreviousSamplingState(TRACE_EVENT_GET_SAMPLING_STATE());
-        TRACE_EVENT_SET_SAMPLING_STATE("V8", "MajorGC");
+        TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8MajorGC");
     } else {
         MajorGCWrapperVisitor visitor(isolate, constructRetainedObjectInfos);
         v8::V8::VisitHandlesWithClassIds(&visitor);
         visitor.notifyFinished();
     }
 }
 
 void V8GCController::gcEpilogue(v8::GCType type, v8::GCCallbackFlags flags)
 {
     // FIXME: It would be nice if the GC callbacks passed the Isolate directly....
@@ skipping 35 matching lines @@
 {
     v8::HandleScope handleScope(isolate);
     v8::Local<v8::Context> context = v8::Context::New(isolate);
     if (context.IsEmpty())
         return;
     v8::Context::Scope contextScope(context);
     V8ScriptRunner::compileAndRunInternalScript(v8String(isolate, "if (gc) gc();"), isolate);
 }
 
 }  // namespace WebCore