Add GL State Restoring Functions

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 e4f0b3538b96126e8921e9831f01a90ace80dea9..33b38315f85185f8b53c48f41778f65aad382ba8 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -142,6 +142,17 @@ class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
   // Gets the service id for any simulated backbuffer fbo.
   virtual void RestoreState() const = 0;
 
+  // Restore States.
+  virtual void RestoreActiveTexture() const = 0;
+  virtual void RestoreAttribute(unsigned index) const = 0;
+  virtual void RestoreBufferBindings() const = 0;
+  virtual void RestoreFramebufferBindings() const = 0;
+  virtual void RestoreGlobalState() const = 0;
+  virtual void RestoreProgramBindings() const = 0;
+  virtual void RestoreRenderbufferBindings() const = 0;
+  virtual void RestoreTextureState(unsigned service_id) const = 0;
+  virtual void RestoreTextureUnitBindings(unsigned unit) const = 0;
+
   // Gets the QueryManager for this context.
   virtual QueryManager* GetQueryManager() = 0;