Add flag bits for partial GrContext reset

src/gpu/gl/GrGpuGL.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 GrGpuGL_DEFINED
@@ skipping 84 matching lines @@
                                const SkIRect& srcRect,
                                const SkIPoint& dstPoint) SK_OVERRIDE;
 
     virtual bool onCanCopySurface(GrSurface* dst,
                                   GrSurface* src,
                                   const SkIRect& srcRect,
                                   const SkIPoint& dstPoint) SK_OVERRIDE;
 
 private:
     // GrGpu overrides
-    virtual void onResetContext() SK_OVERRIDE;
+    virtual void onResetContext(uint32_t resetBits) SK_OVERRIDE;
 
     virtual GrTexture* onCreateTexture(const GrTextureDesc& desc,
                                        const void* srcData,
                                        size_t rowBytes) SK_OVERRIDE;
     virtual GrVertexBuffer* onCreateVertexBuffer(uint32_t size,
                                                  bool dynamic) SK_OVERRIDE;
     virtual GrIndexBuffer* onCreateIndexBuffer(uint32_t size,
                                                bool dynamic) SK_OVERRIDE;
     virtual GrPath* onCreatePath(const SkPath&) SK_OVERRIDE;
     virtual GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&) SK_OVERRIDE;
@@ skipping 317 matching lines @@
     ///@}
 
     // we record what stencil format worked last time to hopefully exit early
     // from our loop that tries stencil formats and calls check fb status.
     int fLastSuccessfulStencilFmtIdx;
 
     typedef GrGpu INHERITED;
 };
 
 #endif