aw: Add more trace events to drawing functions

android_webview/browser/shared_renderer_state.cc

 // Copyright 2014 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 "android_webview/browser/shared_renderer_state.h"
 
 #include "android_webview/browser/browser_view_renderer.h"
 #include "android_webview/browser/deferred_gpu_command_service.h"
 #include "android_webview/browser/hardware_renderer.h"
 #include "android_webview/browser/scoped_app_gl_state_restore.h"
 #include "android_webview/public/browser/draw_gl.h"
 #include "base/bind.h"
+#include "base/debug/trace_event_argument.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 
 namespace android_webview {
 
 namespace internal {
 
 class RequestDrawGLTracker {
  public:
   RequestDrawGLTracker();
@@ skipping 227 matching lines @@
   base::AutoLock lock(lock_);
   resources->swap(returned_resources_);
 }
 
 bool SharedRendererState::ReturnedResourcesEmptyOnUI() const {
   base::AutoLock lock(lock_);
   return returned_resources_.empty();
 }
 
 void SharedRendererState::DrawGL(AwDrawGLInfo* draw_info) {
+  TRACE_EVENT0("android_webview", "DrawFunctor");
   if (draw_info->mode == AwDrawGLInfo::kModeSync) {
+    TRACE_EVENT_INSTANT0("android_webview", "kModeSync",
+                         TRACE_EVENT_SCOPE_THREAD);
     if (hardware_renderer_)
       hardware_renderer_->CommitFrame();
     return;
   }
 
   {
     GLViewRendererManager* manager = GLViewRendererManager::GetInstance();
     base::AutoLock lock(lock_);
     if (renderer_manager_key_ != manager->NullKey()) {
       manager->DidDrawGL(renderer_manager_key_);
@@ skipping 96 matching lines @@
     : shared_renderer_state_(shared_renderer_state) {
   DCHECK(!shared_renderer_state_->IsInsideHardwareRelease());
   shared_renderer_state_->SetInsideHardwareRelease(true);
 }
 
 SharedRendererState::InsideHardwareReleaseReset::~InsideHardwareReleaseReset() {
   shared_renderer_state_->SetInsideHardwareRelease(false);
 }
 
 }  // namespace android_webview