Use float for scroll offset.

cc/blink/web_layer_impl.cc

 // 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 "cc/blink/web_layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 199 matching lines @@
 }
 
 void WebLayerImpl::setBackgroundFilters(const cc::FilterOperations& filters) {
   layer_->SetBackgroundFilters(filters);
 }
 
 bool WebLayerImpl::hasActiveAnimationForTesting() {
   return layer_->HasActiveAnimationForTesting();
 }
 
-void WebLayerImpl::setScrollPositionDouble(blink::WebDoublePoint position) {
-  layer_->SetScrollOffset(gfx::ScrollOffset(position.x, position.y));
+void WebLayerImpl::setScrollOffset(blink::WebFloatSize offset) {
+  layer_->SetScrollOffset(gfx::ScrollOffset(offset.width, offset.height));
 }
 
-blink::WebDoublePoint WebLayerImpl::scrollPositionDouble() const {
-  return blink::WebDoublePoint(layer_->scroll_offset().x(),
-                               layer_->scroll_offset().y());
+blink::WebFloatSize WebLayerImpl::scrollOffset() const {
+  return blink::WebFloatSize(layer_->scroll_offset().x(),
+                             layer_->scroll_offset().y());
 }
 
 void WebLayerImpl::setScrollClipLayer(WebLayer* clip_layer) {
   if (!clip_layer) {
     layer_->SetScrollClipLayerId(Layer::INVALID_ID);
     return;
   }
   layer_->SetScrollClipLayerId(clip_layer->id());
 }
 
@@ skipping 227 matching lines @@
 
 void WebLayerImpl::SetContentsOpaqueIsFixed(bool fixed) {
   contents_opaque_is_fixed_ = fixed;
 }
 
 void WebLayerImpl::setHasWillChangeTransformHint(bool has_will_change) {
   layer_->SetHasWillChangeTransformHint(has_will_change);
 }
 
 }  // namespace cc_blink