Added support for Time Elapsed queries through the 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 cb41004164370392a7b59f9676993ab16d407c64..2d6768ebfeb87d54693f61bad7c24987dba640ad 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -245,6 +245,8 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   bool GetSyncivHelper(
       GLsync sync, GLenum pname, GLsizei bufsize, GLsizei* length,
       GLint* values);
+  bool GetQueryObjectValueHelper(
+      const char* function_name, GLuint id, GLenum pname, GLuint64* params);
 
   void FreeUnusedSharedMemory();
   void FreeEverything();