Migrate WebGL contexts on backgrounded tabs to the integrated GPU.

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
index 1e30865884e393f5e5ef3c0016c19cf83426afdf..39ded42c89b335bc58f5059ec9c332db5b79b400 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -5125,6 +5125,21 @@ error::Error GLES2DecoderImpl::HandleOverlayPromotionHintCHROMIUM(
   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: