Add UniformBlocks related commands to command buffer.

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index 470200e898bd222b527a4ac88a6c1062ccf9f27e..193fbb82e9c51c506dd1ecb1d189c9625151c6a1 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -220,6 +220,12 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   bool GetActiveUniformHelper(
       GLuint program, GLuint index, GLsizei bufsize, GLsizei* length,
       GLint* size, GLenum* type, char* name);
+  void GetUniformBlocksCHROMIUMHelper(
+      GLuint program, std::vector<int8>* result);
+  GLuint GetUniformBlockIndexHelper(GLuint program, const char* name);
+  bool GetActiveUniformBlockNameHelper(
+      GLuint program, GLuint index, GLsizei bufsize,
+      GLsizei* length, char* name);
 
   void FreeUnusedSharedMemory();
   void FreeEverything();