Move definitions of GrGL basic types (e.g. GrGLenum) to their own header.

src/gpu/gl/GrGLPathRendering.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLPathRendering_DEFINED
 #define GrGLPathRendering_DEFINED
 
 #include "SkRefCnt.h"
 #include "GrPathRendering.h"
 #include "GrStencil.h"
-#include "gl/GrGLFunctions.h"
 #include "gl/GrGLProgram.h"
+#include "gl/GrGLTypes.h"
 
 class GrGLNameAllocator;
 class GrGLGpu;
 
 /**
  * This class wraps the NV_path_rendering extension and manages its various
  * API versions. If a method is not present in the GrGLInterface of the GrGLGpu
  * (because the driver version is old), it tries to provide a backup
  * implementation. But if a backup implementation is not practical, it marks the
  * method as not supported.
@@ skipping 85 matching lines @@
     };
     GrGLGpu* gpu();
 
     SkAutoTDelete<GrGLNameAllocator> fPathNameAllocator;
     MatrixState fHWProjectionMatrixState;
     GrStencilSettings fHWPathStencilSettings;
     Caps fCaps;
 };
 
 #endif