Fix main thread top controls scrolling to mirror CC.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 75cc2fb5cbe3015ef1a4ecd215cde43cae31906a..49e964215e24c81f0ac7058f37003a423e167246 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -627,6 +627,8 @@ RenderViewImpl::RenderViewImpl(CompositorDependencies* compositor_deps,
 #if defined(OS_ANDROID)
       top_controls_constraints_(TOP_CONTROLS_STATE_BOTH),
 #endif
+      top_controls_shrink_blink_size_(false),
+      top_controls_height_(0.f),
       has_focus_(false),
       has_scrolled_focused_editable_node_into_rect_(false),
       main_render_frame_(nullptr),
@@ -2598,6 +2600,28 @@ void RenderViewImpl::OnMoveOrResizeStarted() {
     webview()->hidePopups();
 }
 
+void RenderViewImpl::ResizeWebWidget(const ResizeParams& params) {
+    bool resized = size_ != params.new_size ||
+                   physical_backing_size_ != params.physical_backing_size ||
+                   top_controls_height_ != params.top_controls_height;
+
+    size_ = params.new_size;
+    physical_backing_size_ = params.physical_backing_size;
+    top_controls_shrink_blink_size_ = params.top_controls_shrink_blink_size;
+    top_controls_height_ = params.top_controls_height;
+
+    gfx::Size new_widget_size = size_;
+    if (IsUseZoomForDSFEnabled()) {
+      new_widget_size = gfx::ScaleToCeiledSize(new_widget_size,
+                                               GetOriginalDeviceScaleFactor());
+    }
+
+    if (resized)
+        webview()->resizeWithTopControls(new_widget_size,
+                                         top_controls_height_,
+                                         top_controls_shrink_blink_size_);
+}
+
 void RenderViewImpl::OnResize(const ResizeParams& params) {
   TRACE_EVENT0("renderer", "RenderViewImpl::OnResize");
   if (webview()) {