Remove WebViewImpl helper methods for setting scroll offset.

Source/web/tests/TopControlsTest.cpp

 /*
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 465 matching lines @@
 TEST_F(TopControlsTest, MAYBE(ScrollUpPastLimitDoesNotHide))
 {
     WebViewImpl* webView = initialize();
     // Initialize top controls to be shown
     webView->setTopControlsHeight(50.f, true);
     webView->topControls().setShownRatio(1);
     // Use 2x scale so that both pinch viewport and frameview are scrollable
     webView->setPageScaleFactor(2.0);
 
     // Fully scroll frameview but pinchviewport remains scrollable
-    webView->setMainFrameScrollOffset(WebPoint(0, 10000));
+    webView->mainFrame()->setScrollOffset(WebSize(0, 10000));
     pinchViewport().setLocation(FloatPoint(0, 0));
     verticalScroll(-10.f);
     EXPECT_FLOAT_EQ(40, webView->topControls().contentOffset());
 
     webView->topControls().setShownRatio(1);
     // Fully scroll pinch veiwport but frameview remains scrollable
-    webView->setMainFrameScrollOffset(WebPoint(0, 0));
+    webView->mainFrame()->setScrollOffset(WebSize(0, 0));
     pinchViewport().setLocation(FloatPoint(0, 10000));
     verticalScroll(-20.f);
     EXPECT_FLOAT_EQ(30, webView->topControls().contentOffset());
 
     webView->topControls().setShownRatio(1);
     // Fully scroll both frameview and pinch viewort
-    webView->setMainFrameScrollOffset(WebPoint(0, 10000));
+    webView->mainFrame()->setScrollOffset(WebSize(0, 10000));
     pinchViewport().setLocation(FloatPoint(0, 10000));
     verticalScroll(-30.f);
     // Top controls should not move because neither frameview nor pinch viewport
     // are scrollable
     EXPECT_FLOAT_EQ(50.f, webView->topControls().contentOffset());
 }
 
 // Top controls should honor its constraints
 TEST_F(TopControlsTest, MAYBE(StateConstraints))
 {
@@ skipping 35 matching lines @@
     verticalScroll(50.f);
     EXPECT_FLOAT_EQ(50, webView->topControls().contentOffset());
     EXPECT_POINT_EQ(IntPoint(0, 90), frame()->view()->scrollPosition());
 
     verticalScroll(-50.f);
     EXPECT_FLOAT_EQ(0, webView->topControls().contentOffset());
     EXPECT_POINT_EQ(IntPoint(0, 90), frame()->view()->scrollPosition());
 }
 
 } // namespace