Add IPC to allow gpu process to send message for console back to renderer

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 6c6e4e475f03b975e2009fd97af12f35f8933c82..8510f85761ecf4fc815ee8b20c3ac930bf7e3cc7 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -521,6 +521,7 @@ class GLES2DecoderImpl : public base::SupportsWeakPtr<GLES2DecoderImpl>,
       const base::Callback<void(gfx::Size)>& callback);
 
   virtual void SetSwapBuffersCallback(const base::Closure& callback);
+  virtual void SetMsgCallback(const MsgCallback& callback);
 
   virtual void SetStreamTextureManager(StreamTextureManager* manager);
   virtual bool GetServiceTextureId(uint32 client_texture_id,
@@ -1424,6 +1425,7 @@ class GLES2DecoderImpl : public base::SupportsWeakPtr<GLES2DecoderImpl>,
   base::Callback<void(gfx::Size)> resize_callback_;
 
   base::Closure swap_buffers_callback_;
+  MsgCallback msg_callback_;
 
   StreamTextureManager* stream_texture_manager_;
 
@@ -2593,6 +2595,10 @@ void GLES2DecoderImpl::SetSwapBuffersCallback(const base::Closure& callback) {
   swap_buffers_callback_ = callback;
 }
 
+void GLES2DecoderImpl::SetMsgCallback(const MsgCallback& callback) {
+  msg_callback_ = callback;
+}
+
 void GLES2DecoderImpl::SetStreamTextureManager(StreamTextureManager* manager) {
   stream_texture_manager_ = manager;
 }
@@ -4568,6 +4574,9 @@ void GLES2DecoderImpl::SetGLError(GLenum error, const char* msg) {
   if (msg) {
     last_error_ = msg;
     LOG(ERROR) << last_error_;
+    if (!msg_callback_.is_null()) {
+      msg_callback_.Run(0, GLES2Util::GetStringEnum(error) + " : " + msg);
+    }
   }
   error_bits_ |= GLES2Util::GLErrorToErrorBit(error);
 }