Replace uses of GrAssert by SkASSERT.

src/gpu/gl/GrGLIndexBuffer.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 GrGLIndexBuffer_DEFINED
 #define GrGLIndexBuffer_DEFINED
 
@@ skipping 27 matching lines @@
     virtual bool isLocked() const;
     virtual bool updateData(const void* src, size_t srcSizeInBytes);
 
 protected:
     // overrides of GrResource
     virtual void onAbandon() SK_OVERRIDE;
     virtual void onRelease() SK_OVERRIDE;
 
 private:
     GrGpuGL* getGpuGL() const {
-        GrAssert(this->isValid());
+        SkASSERT(this->isValid());
         return (GrGpuGL*)(this->getGpu());
     }
 
     GrGLBufferImpl fImpl;
 
     typedef GrIndexBuffer INHERITED;
 };
 
 #endif