Add subscribeUniform extension pipeline

webkit/common/gpu/webgraphicscontext3d_impl.h

Index: webkit/common/gpu/webgraphicscontext3d_impl.h
diff --git a/webkit/common/gpu/webgraphicscontext3d_impl.h b/webkit/common/gpu/webgraphicscontext3d_impl.h
index ee3cb36086d665bd977ba8000c72f4664e200c4a..3ed0dd97269b502022db5751f1d0417f7aa6e72e 100644
--- a/webkit/common/gpu/webgraphicscontext3d_impl.h
+++ b/webkit/common/gpu/webgraphicscontext3d_impl.h
@@ -483,6 +483,18 @@ class WEBKIT_GPU_EXPORT WebGraphicsContext3DImpl
   virtual WebGLId createAndConsumeTextureCHROMIUM(WGC3Denum target,
                                       const WGC3Dbyte* mailbox);
 
+  virtual void genValuebuffersCHROMIUM(WGC3Dsizei count, WebGLId* ids);
+  virtual WebGLId createValuebufferCHROMIUM();
+  virtual void deleteValuebuffersCHROMIUM(WGC3Dsizei count, WebGLId* ids);
+  virtual void deleteValuebufferCHROMIUM(WebGLId);
+  virtual void bindValuebufferCHROMIUM(WGC3Denum target, WebGLId valuebuffer);
+  virtual WGC3Dboolean isValuebufferCHROMIUM(WebGLId renderbuffer);
+  virtual void subscribeValueCHROMIUM(WGC3Denum target, WGC3Denum subscription);
+  virtual void populateSubscribedValuesCHROMIUM(WGC3Denum target);
+  virtual void uniformValuebufferCHROMIUM(WGC3Dint location,
+                                          WGC3Denum target,
+                                          WGC3Denum subscription);
+
   virtual void insertEventMarkerEXT(const WGC3Dchar* marker);
   virtual void pushGroupMarkerEXT(const WGC3Dchar* marker);
   virtual void popGroupMarkerEXT();