Remove some unnecessary #includes of SkImageFilter.h

include/gpu/GrTextureProvider.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTextureProvider_DEFINED
 #define GrTextureProvider_DEFINED
 
 #include "GrTexture.h"
 #include "GrTypes.h"
-#include "SkImageFilter.h"
 
 class GrSingleOwner;
 
 class SK_API GrTextureProvider {
 public:
     ///////////////////////////////////////////////////////////////////////////
     // Textures
 
     /**
      * Creates a new texture in the resource cache and returns it. The caller owns a
@@ skipping 141 matching lines @@
 
 private:
     GrResourceCache* fCache;
     GrGpu* fGpu;
 
     // In debug builds we guard against improper thread handling
     SkDEBUGCODE(mutable GrSingleOwner* fSingleOwner;)
 };
 
 #endif