Remove WebViewImpl helper methods for setting scroll offset.

Source/web/tests/PinchViewportTest.cpp

 // Copyright 2014 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 "core/frame/PinchViewport.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
@@ skipping 281 matching lines @@
 #endif
 
     initializeWithAndroidSettings();
 
     registerMockedHttpURLLoad("200-by-800-viewport.html");
     navigateTo(m_baseURL + "200-by-800-viewport.html");
 
     webViewImpl()->resize(IntSize(100, 200));
 
     // Scroll main frame to the bottom of the document
-    webViewImpl()->setMainFrameScrollOffset(WebPoint(0, 400));
+    webViewImpl()->mainFrame()->setScrollOffset(WebSize(0, 400));
     EXPECT_POINT_EQ(IntPoint(0, 400), frame()->view()->scrollPosition());
 
     webViewImpl()->setPageScaleFactor(2.0);
 
     // Scroll pinch viewport to the bottom of the main frame
     PinchViewport& pinchViewport = frame()->page()->frameHost().pinchViewport();
     pinchViewport.setLocation(FloatPoint(0, 300));
     EXPECT_FLOAT_POINT_EQ(FloatPoint(0, 300), pinchViewport.location());
 
     // Verify the initial size of the pinch viewport in the CSS pixels
@@ skipping 1345 matching lines @@
     registerMockedHttpURLLoad("window_dimensions_wide_div.html");
     webViewImpl()->resize(IntSize(800, 600));
     navigateTo(m_baseURL + "window_dimensions_wide_div.html");
 
     Element* output = frame()->document()->getElementById("output");
     ASSERT(output);
     EXPECT_EQ(std::string("2000x1500"), std::string(output->innerHTML().ascii().data()));
 }
 
 } // namespace