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

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index 8d171172df60bbcb6a278e30b024ec6b3fa7e043..4405aff3319e6bb98765d810bf6dda4377eb0377 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -249,6 +249,10 @@ void GpuCommandBufferStub::OnInitialize(
     decoder_->set_debug(true);
   }
 
+  decoder_->SetMsgCallback(
+      base::Bind(&GpuCommandBufferStub::SendConsoleMessage,
+                 base::Unretained(this)));
+
   SetSwapInterval();
 
   command_buffer_->SetPutOffsetChangeCallback(
@@ -474,4 +478,16 @@ void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
   surface_->SetVisible(visible);
 }
 
+void GpuCommandBufferStub::SendConsoleMessage(
+    int32 id,
+    const std::string& message) {
+  GPUCommandBufferConsoleMessage console_message;
+  console_message.id = id;
+  console_message.message = message;
+  IPC::Message* msg = new GpuCommandBufferMsg_ConsoleMsg(
+      route_id_, console_message);
+  msg->set_unblock(true);
+  Send(msg);
+}
+
 #endif  // defined(ENABLE_GPU)