Add a |scope| argument to TRACE_EVENT_INSTANT* and require its presence.

content/browser/renderer_host/compositor_impl_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/compositor_impl_android.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 #include <map>
 
@@ skipping 64 matching lines @@
 // static
 void Compositor::Initialize() {
   DCHECK(!CompositorImpl::IsInitialized());
   g_initialized = true;
 }
 
 // static
 void Compositor::InitializeWithFlags(uint32 flags) {
   g_use_direct_gl = flags & DIRECT_CONTEXT_ON_DRAW_THREAD;
   if (flags & ENABLE_COMPOSITOR_THREAD) {
-    TRACE_EVENT_INSTANT0("test_gpu", "ThreadedCompositingInitialization");
+    TRACE_EVENT_INSTANT0("test_gpu", "ThreadedCompositingInitialization",
+                         TRACE_EVENT_SCOPE_THREAD);
     g_impl_thread = new webkit_glue::WebThreadImpl("Browser Compositor");
   }
   Compositor::Initialize();
 }
 
 // static
 bool CompositorImpl::IsInitialized() {
   return g_initialized;
 }
 
@@ skipping 347 matching lines @@
     case ANDROID_BITMAP_FORMAT_RGBA_8888:
       return GL_UNSIGNED_BYTE;
       break;
     case ANDROID_BITMAP_FORMAT_RGB_565:
     default:
       return GL_UNSIGNED_SHORT_5_6_5;
   }
 }
 
 } // namespace content