Add mouse input forwarding to gpu service

gpu/command_buffer/service/gles2_cmd_decoder.h

Index: gpu/command_buffer/service/gles2_cmd_decoder.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.h b/gpu/command_buffer/service/gles2_cmd_decoder.h
index 63618c2a2da03724e96efc202f940c6c9b40de36..e7b81814a5a9f8b1ad1c71ec8294f9d01dbe0564 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -39,6 +39,7 @@ class ImageManager;
 class Logger;
 class QueryManager;
 class VertexArrayManager;
+class ValuebufferManager;
 struct ContextState;
 
 struct DisallowedFeatures {
@@ -170,6 +171,9 @@ class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
   // Gets the ImageManager for this context.
   virtual ImageManager* GetImageManager() = 0;
 
+  // Gets the ValuebufferManager for this context.
+  virtual ValuebufferManager* GetValuebufferManager() = 0;
+
   // Process any pending queries. Returns false if there are no pending queries.
   virtual bool ProcessPendingQueries(bool did_finish) = 0;