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

include/core/SkImage.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImage_DEFINED
 #define SkImage_DEFINED
 
@@ skipping 153 matching lines @@
 
     // DEPRECATED
     GrTexture* getTexture() const;
 
     /**
      *  Returns true if the image is texture backed.
      */
     bool isTextureBacked() const;
 
     /**
-     *  Retrieves the backend API handle of the texture. If flushPendingGrContextReads then the
-     *  GrContext will issue to the backend API any deferred read operations on the texture before
+     *  Retrieves the backend API handle of the texture. If flushPendingGrContextIO then the
+     *  GrContext will issue to the backend API any deferred IO operations on the texture before
      *  returning.
      */
-    GrBackendObject getTextureHandle(bool flushPendingGrContextReads) const;
+    GrBackendObject getTextureHandle(bool flushPendingGrContextIO) const;
 
     /**
      *  Copy the pixels from the image into the specified buffer (pixels + rowBytes),
      *  converting them into the requested format (dstInfo). The image pixels are read
      *  starting at the specified (srcX,srcY) location.
      *
      *  The specified ImageInfo and (srcX,srcY) offset specifies a source rectangle
      *
      *      srcR.setXYWH(srcX, srcY, dstInfo.width(), dstInfo.height());
      *
@@ skipping 81 matching lines @@
     const int       fWidth;
     const int       fHeight;
     const uint32_t  fUniqueID;
 
     static uint32_t NextUniqueID();
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif