For webkit_glue::MockWebFrame, define setScrollOffset() that will be soon introduced.

webkit/mocks/mock_webframe.cc

 // Copyright (c) 2011 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.
 
 #include "webkit/mocks/mock_webframe.h"
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebURLRequest.h"
 
 namespace webkit_glue {
 
@@ skipping 26 matching lines @@
 WebString MockWebFrame::encoding() const {
   return WebString();
 }
 
 void MockWebFrame::setCanHaveScrollbars(bool) {}
 
 WebSize MockWebFrame::scrollOffset() const {
   return WebSize(0,0);
 }
 
+void MockWebFrame::setScrollOffset(const WebSize&) {}
+
 WebSize MockWebFrame::contentsSize() const {
   return WebSize();
 }
 
 int MockWebFrame::contentsPreferredWidth() const {
   return 0;
 }
 
 int MockWebFrame::documentElementScrollHeight() const {
   return 0;
@@ skipping 327 matching lines @@
                                      double time,
                                      const WebString& elementId) {
   return false;
 }
 
 WebString MockWebFrame::layerTreeAsText() const {
   return WebString();
 }
 
 }  // namespace webkit_glue