Add onMemoryDump to GrContext

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 15 matching lines @@
 
     void bind() const {
         if (!this->wasDestroyed()) {
             fImpl.bind(this->getGpuGL());
         }
     }
 
 protected:
     void onAbandon() override;
     void onRelease() override;
+    void setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
+                          const SkString& dumpName) const override;
 
 private:
     void* onMap() override;
     void onUnmap() override;
     bool onUpdateData(const void* src, size_t srcSizeInBytes) override;
 
     GrGLGpu* getGpuGL() const {
         SkASSERT(!this->wasDestroyed());
         return (GrGLGpu*)(this->getGpu());
     }
 
     GrGLBufferImpl fImpl;
 
     typedef GrIndexBuffer INHERITED;
 };
 
 #endif