aw: Add versions to public function tables

android_webview/public/browser/draw_gl.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_
 #define ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_
 
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ skipping 68 matching lines @@
 typedef void AwReleaseGraphicBufferFunction(long buffer_id);
 // Called to map a GraphicBuffer in |mode|.
 typedef int AwMapFunction(long buffer_id, AwMapMode mode, void** vaddr);
 // Called to unmap a GraphicBuffer
 typedef int AwUnmapFunction(long buffer_id);
 // Called to get a native buffer pointer
 typedef void* AwGetNativeBufferFunction(long buffer_id);
 // Called to get the stride of the buffer
 typedef unsigned int AwGetStrideFunction(long buffer_id);
 
+static const int kAwDrawGLFunctionTableVersion = 1;
+
 // Set of functions used in rendering in hardware mode
 struct AwDrawGLFunctionTable {
+  int version;
   AwCreateGraphicBufferFunction* create_graphic_buffer;
   AwReleaseGraphicBufferFunction* release_graphic_buffer;
   AwMapFunction* map;
   AwUnmapFunction* unmap;
   AwGetNativeBufferFunction* get_native_buffer;
   AwGetStrideFunction* get_stride;
 };
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_