Remove WebViewImpl helper methods for setting scroll offset.

Source/web/DevToolsEmulator.cpp

 // Copyright 2015 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 "config.h"
 #include "web/DevToolsEmulator.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
@@ skipping 246 matching lines @@
         if (gestureEvent.type() == PlatformEvent::GesturePinchBegin) {
             m_lastPinchAnchorCss = adoptPtr(new IntPoint(frameView->scrollPosition() + gestureEvent.position()));
             m_lastPinchAnchorDip = adoptPtr(new IntPoint(gestureEvent.position()));
             m_lastPinchAnchorDip->scale(pageScaleFactor, pageScaleFactor);
         }
         if (gestureEvent.type() == PlatformEvent::GesturePinchUpdate && m_lastPinchAnchorCss) {
             float newPageScaleFactor = pageScaleFactor * gestureEvent.scale();
             IntPoint anchorCss(*m_lastPinchAnchorDip.get());
             anchorCss.scale(1.f / newPageScaleFactor, 1.f / newPageScaleFactor);
             m_webViewImpl->setPageScaleFactor(newPageScaleFactor);
-            m_webViewImpl->setMainFrameScrollOffset(*m_lastPinchAnchorCss.get() - toIntSize(anchorCss));
+            m_webViewImpl->mainFrame()->setScrollOffset(toIntSize(*m_lastPinchAnchorCss.get() - toIntSize(anchorCss)));
         }
         if (gestureEvent.type() == PlatformEvent::GesturePinchEnd) {
             m_lastPinchAnchorCss.clear();
             m_lastPinchAnchorDip.clear();
         }
         return true;
     }
 
     return false;
 }
 
 } // namespace blink