Include EXT_window_rectangles API

include/gpu/gl/GrGLInterface.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLInterface_DEFINED
 #define GrGLInterface_DEFINED
 
@@ skipping 442 matching lines @@
 
         /* KHR_debug */
         GrGLFunction<GrGLDebugMessageControlProc> fDebugMessageControl;
         GrGLFunction<GrGLDebugMessageInsertProc> fDebugMessageInsert;
         GrGLFunction<GrGLDebugMessageCallbackProc> fDebugMessageCallback;
         GrGLFunction<GrGLGetDebugMessageLogProc> fGetDebugMessageLog;
         GrGLFunction<GrGLPushDebugGroupProc> fPushDebugGroup;
         GrGLFunction<GrGLPopDebugGroupProc> fPopDebugGroup;
         GrGLFunction<GrGLObjectLabelProc> fObjectLabel;
 
+        /* EXT_window_rectangles */
+        GrGLFunction<GrGLWindowRectanglesProc> fWindowRectangles;
+
         /* EGL functions */
         GrGLFunction<GrEGLCreateImageProc> fEGLCreateImage;
         GrGLFunction<GrEGLDestroyImageProc> fEGLDestroyImage;
     } fFunctions;
 
     // This exists for internal testing.
     virtual void abandon() const {}
 };
 
 #endif