Remove two unnecessary params in ViewHostMsg_UpdateRect_Params

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 49ee8e48f09e47f0b9305899e12443c993a9e26f..a54d860bc9e646cb9c5d0c9b52559e8042e2f17f 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -643,6 +643,10 @@ void RenderWidgetHostViewAura::SetBounds(const gfx::Rect& rect) {
   InternalSetBounds(gfx::Rect(relative_origin, rect.size()));
 }
 
+gfx::Vector2dF RenderWidgetHostViewAura::GetLastScrollOffset() const {
+  return last_scroll_offset_;
+}
+
 gfx::NativeView RenderWidgetHostViewAura::GetNativeView() const {
   return window_;
 }
@@ -1022,6 +1026,8 @@ void RenderWidgetHostViewAura::OnSwapCompositorFrame(
     uint32 output_surface_id,
     scoped_ptr<cc::CompositorFrame> frame) {
   TRACE_EVENT0("content", "RenderWidgetHostViewAura::OnSwapCompositorFrame");
+
+  last_scroll_offset_ = frame->metadata.root_scroll_offset;
   if (frame->delegated_frame_data) {
     delegated_frame_host_->SwapDelegatedFrame(
         output_surface_id,