Replace uses of GrAssert by SkASSERT.

include/gpu/GrRenderTarget.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 GrRenderTarget_DEFINED
 #define GrRenderTarget_DEFINED
 
@@ skipping 138 matching lines @@
     }
 
     // override of GrResource
     virtual void onAbandon() SK_OVERRIDE;
     virtual void onRelease() SK_OVERRIDE;
 
 private:
     friend class GrTexture;
     // called by ~GrTexture to remove the non-ref'ed back ptr.
     void owningTextureDestroyed() {
-        GrAssert(NULL != fTexture);
+        SkASSERT(NULL != fTexture);
         fTexture = NULL;
     }
 
     GrStencilBuffer*  fStencilBuffer;
     GrTexture*        fTexture; // not ref'ed
 
     SkIRect           fResolveRect;
 
     typedef GrSurface INHERITED;
 };
 
 #endif