Comment out invalid assert.

src/gpu/gl/GrGLBufferImpl.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLBufferImpl.h"
 #include "GrGpuGL.h"
 
@@ skipping 140 matching lines @@
         GL_CALL(gpu, BufferSubData(fBufferType, 0, srcSizeInBytes, src));
     } else {
         GL_CALL(gpu, BufferData(fBufferType, srcSizeInBytes, src, usage));
     }
 #endif
     return true;
 }
 
 void GrGLBufferImpl::validate() const {
     GrAssert(GR_GL_ARRAY_BUFFER == fBufferType || GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType);
-    GrAssert((0 == fDesc.fID) == (NULL != fCPUData));
+    // The following assert isn't valid when the buffer has been abandoned:
+    // GrAssert((0 == fDesc.fID) == (NULL != fCPUData));
     GrAssert(0 != fDesc.fID || !fDesc.fIsWrapped);
     GrAssert(NULL == fCPUData || NULL == fLockPtr || fCPUData == fLockPtr);
 }