Implemented failIfMajorPerformanceCaveat WebGL context creation attribute.

gpu/command_buffer/client/gl_in_process_context.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/client/gl_in_process_context.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 120 matching lines @@
   const int32 ALPHA_SIZE     = 0x3021;
   const int32 BLUE_SIZE      = 0x3022;
   const int32 GREEN_SIZE     = 0x3023;
   const int32 RED_SIZE       = 0x3024;
   const int32 DEPTH_SIZE     = 0x3025;
   const int32 STENCIL_SIZE   = 0x3026;
   const int32 SAMPLES        = 0x3031;
   const int32 SAMPLE_BUFFERS = 0x3032;
   const int32 NONE           = 0x3038;
 
+  // Chromium-specific attributes
+  const int32 FAIL_IF_MAJOR_PERF_CAVEAT = 0x10002;

[Ken Russell (switch to Gerrit), 2013/11/23 03:07:04]

Please add a comment about dependencies between this file and
gles2_cmd_utils.cc.

+
   std::vector<int32> attrib_vector;
   if (attribs.alpha_size >= 0) {
     attrib_vector.push_back(ALPHA_SIZE);
     attrib_vector.push_back(attribs.alpha_size);
   }
   if (attribs.blue_size >= 0) {
     attrib_vector.push_back(BLUE_SIZE);
     attrib_vector.push_back(attribs.blue_size);
   }
   if (attribs.green_size >= 0) {
@@ skipping 13 matching lines @@
     attrib_vector.push_back(attribs.stencil_size);
   }
   if (attribs.samples >= 0) {
     attrib_vector.push_back(SAMPLES);
     attrib_vector.push_back(attribs.samples);
   }
   if (attribs.sample_buffers >= 0) {
     attrib_vector.push_back(SAMPLE_BUFFERS);
     attrib_vector.push_back(attribs.sample_buffers);
   }
+  if (attribs.fail_if_major_perf_caveat > 0) {
+    attrib_vector.push_back(FAIL_IF_MAJOR_PERF_CAVEAT);
+    attrib_vector.push_back(attribs.fail_if_major_perf_caveat);
+  }
   attrib_vector.push_back(NONE);
 
   base::Closure wrapped_callback =
       base::Bind(&GLInProcessContextImpl::OnContextLost, AsWeakPtr());
   command_buffer_.reset(new InProcessCommandBuffer());
 
   scoped_ptr<base::AutoLock> scoped_shared_context_lock;
   scoped_refptr<gles2::ShareGroup> share_group;
   if (share_resources) {
     scoped_shared_context_lock.reset(
@@ skipping 136 matching lines @@
       gfx::kNullAcceleratedWidget,
       surface->GetSize(),
       attribs,
       gpu_preference))
     return NULL;
 
   return context.release();
 }
 
 }  // namespace gpu