Rename flushForExternalRead->flushForExternalIO and always call in SkSurface::getTextureHandle

include/gpu/GrContext.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContext_DEFINED
 #define GrContext_DEFINED
 
@@ skipping 286 matching lines @@
                           SkIPoint::Make(0,0));
         return true;
     }
 
     /**
      * After this returns any pending writes to the surface will have been issued to the backend 3D API.
      */
     void flushSurfaceWrites(GrSurface* surface);
 
     /**
-     * Equivalent to flushSurfaceWrites but also performs MSAA resolve if necessary. This call is
-     * used to make the surface contents available to be read in the backend 3D API, usually for a
-     * compositing step external to Skia.
+     * Finalizes all pending reads and writes to the surface and also performs an MSAA resolve
+     * if necessary.
      *
      * It is not necessary to call this before reading the render target via Skia/GrContext.
      * GrContext will detect when it must perform a resolve before reading pixels back from the
      * surface or using it as a texture.
      */
-    void prepareSurfaceForExternalRead(GrSurface*);
+    void prepareSurfaceForExternalIO(GrSurface*);
 
     /**
      * An ID associated with this context, guaranteed to be unique.
      */
     uint32_t uniqueID() { return fUniqueID; }
 
     ///////////////////////////////////////////////////////////////////////////
     // Functions intended for internal use only.
     GrGpu* getGpu() { return fGpu; }
     const GrGpu* getGpu() const { return fGpu; }
@@ skipping 129 matching lines @@
     /**
      * A callback similar to the above for use by the TextBlobCache
      * TODO move textblob draw calls below context so we can use the call above.
      */
     static void TextBlobCacheOverBudgetCB(void* data);
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif