Delete layout_viewport_size.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 1281dc4cf7bfa6f937b89dc72b33a9449a4bb65b..6c6513dbd05267eefb2a466c8d03cdc68a4cbf84 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -364,13 +364,13 @@ void RenderWidgetCompositor::clearRootLayer() {
 }
 
 void RenderWidgetCompositor::setViewportSize(
-    const WebSize& layout_viewport_size,
+    const WebSize&,
     const WebSize& device_viewport_size) {
-  layer_tree_host_->SetViewportSize(layout_viewport_size, device_viewport_size);
+  layer_tree_host_->SetViewportSize(device_viewport_size);
 }
 
 WebSize RenderWidgetCompositor::layoutViewportSize() const {
-  return layer_tree_host_->layout_viewport_size();
+  return layer_tree_host_->device_viewport_size();
 }
 
 WebSize RenderWidgetCompositor::deviceViewportSize() const {