Added some instrumentation to the software compositor.

content/renderer/gpu/compositor_software_output_device_gl_adapter.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/renderer/gpu/compositor_software_output_device_gl_adapter.h"
 
+#include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkDevice.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
 
 #include <GLES2/gl2.h>
 
 using WebKit::WebImage;
@@ skipping 137 matching lines @@
   context3d_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   context3d_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   context3d_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   context3d_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
   context3d_->viewport(0, 0, viewport_size.width(), viewport_size.height());
   context3d_->reshape(viewport_size.width(), viewport_size.height());
 }
 
 void CompositorSoftwareOutputDeviceGLAdapter::Draw(void* pixels) {
+  TRACE_EVENT0("renderer", "CompositorSoftwareOutputDeviceGLAdapter::Draw");
   if (!initialized_)
     NOTREACHED();
   if (!framebuffer_texture_id_)
     NOTREACHED();
 
   context3d_->makeContextCurrent();
   context3d_->ensureFramebufferCHROMIUM();
   context3d_->clear(GL_COLOR_BUFFER_BIT);
 
   context3d_->texImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
       framebuffer_texture_size_.width(), framebuffer_texture_size_.height(),
       0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 
   context3d_->drawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
   context3d_->prepareTexture();
 }
 
 }  // namespace content