Migrate WebGL contexts on backgrounded tabs to the integrated GPU.

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

 // Copyright 2014 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 5107 matching lines @@
       *static_cast<const volatile gles2::cmds::OverlayPromotionHintCHROMIUM*>(
           cmd_data);
   GLuint texture = c.texture;
   GLboolean promotion_hint = static_cast<GLboolean>(c.promotion_hint);
   GLint display_x = static_cast<GLint>(c.display_x);
   GLint display_y = static_cast<GLint>(c.display_y);
   DoOverlayPromotionHintCHROMIUM(texture, promotion_hint, display_x, display_y);
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandlePerformanceHintCHROMIUM(
+    uint32_t immediate_data_size,
+    const volatile void* cmd_data) {
+  const volatile gles2::cmds::PerformanceHintCHROMIUM& c =
+      *static_cast<const volatile gles2::cmds::PerformanceHintCHROMIUM*>(
+          cmd_data);
+  GLenum mode = static_cast<GLenum>(c.mode);
+  if (!validators_->performance_hint_mode.IsValid(mode)) {
+    LOCAL_SET_GL_ERROR_INVALID_ENUM("glPerformanceHintCHROMIUM", mode, "mode");
+    return error::kNoError;
+  }
+  DoPerformanceHintCHROMIUM(mode);
+  return error::kNoError;
+}
+
 bool GLES2DecoderImpl::SetCapabilityState(GLenum cap, bool enabled) {
   switch (cap) {
     case GL_BLEND:
       state_.enable_flags.blend = enabled;
       if (state_.enable_flags.cached_blend != enabled ||
           state_.ignore_cached_state) {
         state_.enable_flags.cached_blend = enabled;
         return true;
       }
       return false;
@@ skipping 98 matching lines @@
         state_.enable_flags.cached_sample_alpha_to_one_ext = enabled;
         return true;
       }
       return false;
     default:
       NOTREACHED();
       return false;
   }
 }
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_AUTOGEN_H_