Delete zoomed_viewport_offset_ and its users.

cc/layer_tree_impl.cc

 // Copyright 2011 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/layer_tree_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/layer_tree_host_common.h"
 #include "cc/layer_tree_host_impl.h"
 #include "ui/gfx/vector2d_conversions.h"
@@ skipping 89 matching lines @@
   gfx::SizeF view_bounds;
   if (!settings().pageScalePinchZoomEnabled) {
     view_bounds = device_viewport_size();
     if (LayerImpl* clip_layer = root_scroll_layer_->parent()) {
       // Compensate for non-overlay scrollbars.
       if (clip_layer->masksToBounds())
         view_bounds = gfx::ScaleSize(clip_layer->bounds(), device_scale_factor());
     }
     view_bounds.Scale(1 / pinch_zoom_viewport().page_scale_delta());
   } else {
-    view_bounds = layout_viewport_size();
+    view_bounds = pinch_zoom_viewport().LayoutSpaceViewportSize();
   }
 
   gfx::Vector2dF max_scroll = gfx::Rect(ScrollableSize()).bottom_right() -
       gfx::RectF(view_bounds).bottom_right();
 
   // The viewport may be larger than the contents in some cases, such as
   // having a vertical scrollbar but no horizontal overflow.
   max_scroll.ClampToMin(gfx::Vector2dF());
 
   root_scroll_layer_->setMaxScrollOffset(gfx::ToFlooredVector2d(max_scroll));
@@ skipping 201 matching lines @@
 
 AnimationRegistrar* LayerTreeImpl::animationRegistrar() const {
   return layer_tree_host_impl_->animationRegistrar();
 }
 
 const PinchZoomViewport& LayerTreeImpl::pinch_zoom_viewport() const {
   return layer_tree_host_impl_->pinchZoomViewport();
 }
 
 } // namespace cc