Performance fixes for CoreAnimation.

content/browser/renderer_host/compositing_iosurface_mac.mm

 // 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/compositing_iosurface_mac.h"
 
 #include <OpenGL/CGLRenderers.h>
 #include <OpenGL/OpenGL.h>
 
 #include "base/bind.h"
@@ skipping 612 matching lines @@
   return true;
 }
 
 void CompositingIOSurfaceMac::UnrefIOSurface() {
   CGLSetCurrentContext(offscreen_context_->cgl_context());
   UnrefIOSurfaceWithContextCurrent();
   CGLSetCurrentContext(0);
 }
 
 void CompositingIOSurfaceMac::DrawQuad(const SurfaceQuad& quad) {
+  TRACE_EVENT0("gpu", "CompositingIOSurfaceMac::DrawQuad");
+
   glEnableClientState(GL_VERTEX_ARRAY); CHECK_AND_SAVE_GL_ERROR();
   glEnableClientState(GL_TEXTURE_COORD_ARRAY); CHECK_AND_SAVE_GL_ERROR();
 
   glVertexPointer(2, GL_FLOAT, sizeof(SurfaceVertex), &quad.verts_[0].x_);
   glTexCoordPointer(2, GL_FLOAT, sizeof(SurfaceVertex), &quad.verts_[0].tx_);
   glDrawArrays(GL_QUADS, 0, 4); CHECK_AND_SAVE_GL_ERROR();
 
   glDisableClientState(GL_VERTEX_ARRAY);
   glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 }
@@ skipping 392 matching lines @@
 }
 
 GLenum CompositingIOSurfaceMac::GetAndSaveGLError() {
   GLenum gl_error = glGetError();
   if (gl_error_ == GL_NO_ERROR)
     gl_error_ = gl_error;
   return gl_error;
 }
 
 }  // namespace content