Migrate WebGL contexts on backgrounded tabs to the integrated GPU.

gpu/command_buffer/service/gles2_cmd_validation_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 205 matching lines @@
   bool IsValid(const GLint value) const;
 };
 PathParameterJoinValuesValidator path_parameter_join_values;
 
 class PathTransformTypeValidator {
  public:
   bool IsValid(const GLenum value) const;
 };
 PathTransformTypeValidator path_transform_type;
 
+class PerformanceHintModeValidator {
+ public:
+  bool IsValid(const GLenum value) const;
+};
+PerformanceHintModeValidator performance_hint_mode;
+
 ValueValidator<GLenum> pixel_store;
 class PixelStoreAlignmentValidator {
  public:
   bool IsValid(const GLint value) const;
 };
 PixelStoreAlignmentValidator pixel_store_alignment;
 
 ValueValidator<GLenum> pixel_type;
 class ProgramParameterValidator {
  public:
@@ skipping 158 matching lines @@
  public:
   bool IsValid(const GLenum value) const;
 };
 VertexAttribITypeValidator vertex_attrib_i_type;
 
 ValueValidator<GLenum> vertex_attrib_type;
 ValueValidator<GLenum> vertex_attribute;
 ValueValidator<GLenum> vertex_pointer;
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_AUTOGEN_H_