Add UMA to track the duration of CheckFrambufferValid

gpu/command_buffer/service/gles2_cmd_decoder.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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 4207 matching lines @@
         GetBackbufferServiceId());
   }
   OnFboChanged();
 }
 
 bool GLES2DecoderImpl::CheckFramebufferValid(
     Framebuffer* framebuffer,
     GLenum target,
     GLenum gl_error,
     const char* func_name) {
+  SCOPED_UMA_HISTOGRAM_TIMER("GPU.CheckFramebufferValidDuration");
+
   if (!framebuffer) {
     if (surfaceless_)
       return false;
     if (backbuffer_needs_clear_bits_) {
       glClearColor(0, 0, 0, BackBufferAlphaClearColor());
       state_.SetDeviceColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
       glClearStencil(0);
       state_.SetDeviceStencilMaskSeparate(GL_FRONT, kDefaultStencilMask);
       state_.SetDeviceStencilMaskSeparate(GL_BACK, kDefaultStencilMask);
       glClearDepth(1.0f);
@@ skipping 14627 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu