Use float for scroll offset.

third_party/WebKit/Source/web/tests/FrameThrottlingTest.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 "bindings/core/v8/ScriptController.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLIFrameElement.h"
@@ skipping 308 matching lines @@
   EXPECT_FALSE(frameElement->contentDocument()->view()->canThrottleRendering());
   compositeFrame();
   EXPECT_TRUE(frameElement->contentDocument()->view()->canThrottleRendering());
 
   // Scroll down to unthrottle the frame. The first frame we composite after
   // scrolling won't contain the frame yet, but will schedule another repaint.
   webView()
       .mainFrameImpl()
       ->frameView()
       ->layoutViewportScrollableArea()
-      ->setScrollPosition(DoublePoint(0, 480), ProgrammaticScroll);
+      ->setScrollOffset(ScrollOffset(0, 480), ProgrammaticScroll);
   auto displayItems = compositeFrame();
   EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "green"));
 
   // Now the frame contents should be visible again.
   auto displayItems2 = compositeFrame();
   EXPECT_TRUE(displayItems2.contains(SimCanvas::Rect, "green"));
 }
 
 TEST_F(FrameThrottlingTest, UnthrottlingTriggersRepaintInCompositedChild) {
   // Create a hidden frame with a composited child layer.
@@ skipping 18 matching lines @@
   EXPECT_FALSE(frameElement->contentDocument()->view()->canThrottleRendering());
   compositeFrame();
   EXPECT_TRUE(frameElement->contentDocument()->view()->canThrottleRendering());
 
   // Scroll down to unthrottle the frame. The first frame we composite after
   // scrolling won't contain the frame yet, but will schedule another repaint.
   webView()
       .mainFrameImpl()
       ->frameView()
       ->layoutViewportScrollableArea()
-      ->setScrollPosition(DoublePoint(0, 480), ProgrammaticScroll);
+      ->setScrollOffset(ScrollOffset(0, 480), ProgrammaticScroll);
   auto displayItems = compositeFrame();
   EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "green"));
 
   // Now the composited child contents should be visible again.
   auto displayItems2 = compositeFrame();
   EXPECT_TRUE(displayItems2.contains(SimCanvas::Rect, "green"));
 }
 
 TEST_F(FrameThrottlingTest, ChangeStyleInThrottledFrame) {
   // Create a hidden frame which is throttled.
@@ skipping 13 matching lines @@
 
   // Change the background color of the frame's contents from red to green.
   frameElement->contentDocument()->body()->setAttribute(styleAttr,
                                                         "background: green");
 
   // Scroll down to unthrottle the frame.
   webView()
       .mainFrameImpl()
       ->frameView()
       ->layoutViewportScrollableArea()
-      ->setScrollPosition(DoublePoint(0, 480), ProgrammaticScroll);
+      ->setScrollOffset(ScrollOffset(0, 480), ProgrammaticScroll);
   auto displayItems = compositeFrame();
   EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "red"));
   EXPECT_FALSE(displayItems.contains(SimCanvas::Rect, "green"));
 
   // Make sure the new style shows up instead of the old one.
   auto displayItems2 = compositeFrame();
   EXPECT_TRUE(displayItems2.contains(SimCanvas::Rect, "green"));
 }
 
 TEST_F(FrameThrottlingTest, ThrottledFrameWithFocus) {
@@ skipping 455 matching lines @@
   localFrame->script().executeScriptInMainWorld(
       "window.requestAnimationFrame(function() {\n"
       "  var throttledFrame = window.parent.frames.first;\n"
       "  throttledFrame.document.documentElement.style = 'margin: 50px';\n"
       "  throttledFrame.document.querySelector('#d').getBoundingClientRect();\n"
       "});\n");
   compositeFrame();
 }
 
 }  // namespace blink