Migrate WebGL contexts on backgrounded tabs to the integrated GPU.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough_handlers_autogen.cc

 // 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 4135 matching lines @@
   GLint display_x = static_cast<GLint>(c.display_x);
   GLint display_y = static_cast<GLint>(c.display_y);
   error::Error error = DoOverlayPromotionHintCHROMIUM(texture, promotion_hint,
                                                       display_x, display_y);
   if (error != error::kNoError) {
     return error;
   }
   return error::kNoError;
 }
 
+error::Error GLES2DecoderPassthroughImpl::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);
+  error::Error error = DoPerformanceHintCHROMIUM(mode);
+  if (error != error::kNoError) {
+    return error;
+  }
+  return error::kNoError;
+}
+
 }  // namespace gles2
 }  // namespace gpu