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 8d72335f7febf31488246b22aeebb540336ed7be..0b95a28013fd2a837fa9f8447d6f8da87ee81033 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -29,6 +29,7 @@ namespace gpu {
 class AsyncPixelTransferDelegate;
 class AsyncPixelTransferManager;
 struct Mailbox;
+union ValueState;
 
 namespace gles2 {
 
@@ -39,6 +40,7 @@ class ImageManager;
 class Logger;
 class QueryManager;
 class VertexArrayManager;
+class ValuebufferManager;
 struct ContextState;
 
 struct DisallowedFeatures {
@@ -170,6 +172,9 @@ 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() = 0;