Trace background/visibility events

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 "base/android/jni_android.h"
@@ skipping 418 matching lines @@
   host_->SetLayerTreeHostClientReady();
   host_->SetViewportSize(size_);
   host_->set_has_transparent_background(has_transparent_background_);
   host_->SetDeviceScaleFactor(device_scale_factor_);
 
   if (needs_animate_)
     host_->SetNeedsAnimate();
 }
 
 void CompositorImpl::SetVisible(bool visible) {
+  TRACE_EVENT1("cc", "CompositorImpl::SetVisible", "visible", visible);
   if (!visible) {
     DCHECK(host_);
     // Look for any layers that were attached to the root for readback
     // and are waiting for Composite() to happen.
     bool readback_pending = false;
     for (size_t i = 0; i < root_layer_->children().size(); ++i) {
       if (root_layer_->children()[i]->HasCopyRequest()) {
         readback_pending = true;
         break;
       }
@@ skipping 270 matching lines @@
 
 void CompositorImpl::SetNeedsAnimate() {
   needs_animate_ = true;
   if (!host_)
     return;
 
   host_->SetNeedsAnimate();
 }
 
 }  // namespace content