Fix main thread top controls scrolling to mirror CC.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 0f53306133004e870e0fbca12970d1156fdd0860..eb8846652161ff4eecfdba8c539558ad5ae0801f 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1136,9 +1136,6 @@ void RenderWidget::Resize(const ResizeParams& params) {
   is_fullscreen_granted_ = params.is_fullscreen_granted;
   display_mode_ = params.display_mode;
 
-  webwidget_->setTopControlsHeight(params.top_controls_height,
-                                   top_controls_shrink_blink_size_);
-
   if (resized) {
     gfx::Size new_widget_size = size_;
     if (IsUseZoomForDSFEnabled()) {
@@ -1148,7 +1145,10 @@ void RenderWidget::Resize(const ResizeParams& params) {
     // When resizing, we want to wait to paint before ACK'ing the resize.  This
     // ensures that we only resize as fast as we can paint.  We only need to
     // send an ACK if we are resized to a non-empty rect.
-    webwidget_->resize(new_widget_size);
+    webwidget_->resize(
+        new_widget_size,
+        top_controls_height_,
+        top_controls_shrink_blink_size_);

[majidvp, 2016/04/06 18:07:30]

I think for the top control anchoring to work correctly
you also need to resize the visual viewport in the same call.
This mean folding WebWidget::resizeVisualViewport into
the same same resize call.

[bokan, 2016/04/06 19:23:35]

We already do this in WebViewImpl::performResize. When resize is called, both
viewports are resized. The call below to resizeVisualViewport is for the OSK
where we might not have a layout affecting resize (i.e. resized == false above).

   }
   WebSize visual_viewport_size;