Revert of Fix (or tag) uses of explicit '64' instead of GL_MAILBOX_SIZE_CHROMIUM

content/browser/gpu/gpu_process_host_ui_shim.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/gpu/gpu_process_host_ui_shim.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/id_map.h"
 #include "base/lazy_instance.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/port/browser/render_widget_host_view_port.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/gl/gl_switches.h"
 
+// From gl2/gl2ext.h.
+#ifndef GL_MAILBOX_SIZE_CHROMIUM
+#define GL_MAILBOX_SIZE_CHROMIUM 64
+#endif
+
 namespace content {
 
 namespace {
 
 // One of the linux specific headers defines this as a macro.
 #ifdef DestroyAll
 #undef DestroyAll
 #endif
 
 base::LazyInstance<IDMap<GpuProcessHostUIShim> > g_hosts_by_id =
@@ skipping 341 matching lines @@
   view->AcceleratedSurfaceRelease();
 }
 
 void GpuProcessHostUIShim::OnVideoMemoryUsageStatsReceived(
     const GPUVideoMemoryUsageStats& video_memory_usage_stats) {
   GpuDataManagerImpl::GetInstance()->UpdateVideoMemoryUsageStats(
       video_memory_usage_stats);
 }
 
 }  // namespace content