Add SetFileSize() IPC for WebSQL.

content/renderer/renderer_blink_platform_impl.h

 // Copyright (c) 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 CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 73 matching lines @@
   virtual blink::Platform::FileHandle databaseOpenFile(
       const blink::WebString& vfs_file_name, int desired_flags);
   virtual int databaseDeleteFile(const blink::WebString& vfs_file_name,
                                  bool sync_dir);
   virtual long databaseGetFileAttributes(
       const blink::WebString& vfs_file_name);
   virtual long long databaseGetFileSize(
       const blink::WebString& vfs_file_name);
   virtual long long databaseGetSpaceAvailableForOrigin(
       const blink::WebString& origin_identifier);
+  virtual bool databaseSetFileSize(
+      const blink::WebString& vfs_file_name, long long size);

[michaeln, 2015/04/01 23:43:26]

oh, is it saying to use 'override' here instead of 'virtual' since you're
overriding the BlinkPlatformImpl method?

[Scott Hess - ex-Googler, 2015/04/02 22:52:41]

I think that if it's a Platform method, it's fine, but if it's only in
BlinkPlatformImpl, it's not fine.  The Platform.h change landed, so np at this
point.

   virtual blink::WebString signedPublicKeyAndChallengeString(
       unsigned key_size_index,
       const blink::WebString& challenge,
       const blink::WebURL& url);
   virtual void getPluginList(bool refresh,
                              blink::WebPluginListBuilder* builder);
   virtual blink::WebPublicSuffixList* publicSuffixList();
   virtual void screenColorProfile(blink::WebVector<char>* to_profile);
   virtual blink::WebScrollbarBehavior* scrollbarBehavior();
   virtual blink::WebIDBFactory* idbFactory();
@@ skipping 152 matching lines @@
   device::VibrationManagerPtr vibration_manager_;
 
   IDMap<PlatformEventObserverBase, IDMapOwnPointer> platform_event_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererBlinkPlatformImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_