[Mac] Replace SetOverlayView with AllowOtherViews.

content/browser/web_contents/web_contents_view_mac.mm

Index: content/browser/web_contents/web_contents_view_mac.mm
diff --git a/content/browser/web_contents/web_contents_view_mac.mm b/content/browser/web_contents/web_contents_view_mac.mm
index 39e579baec2e64258a39bf4110eb15ffda57f3d5..48d3cca1f447090e362f2608bd11f5faf7ada872 100644
--- a/content/browser/web_contents/web_contents_view_mac.mm
+++ b/content/browser/web_contents/web_contents_view_mac.mm
@@ -82,8 +82,7 @@ WebContentsViewMac::WebContentsViewMac(WebContentsImpl* web_contents,
     : web_contents_(web_contents),
       delegate_(delegate),
       allow_overlapping_views_(false),
-      overlay_view_(NULL),
-      underlay_view_(NULL) {
+      allow_other_views_(false) {
 }
 
 WebContentsViewMac::~WebContentsViewMac() {
@@ -278,52 +277,19 @@ bool WebContentsViewMac::GetAllowOverlappingViews() const {
   return allow_overlapping_views_;
 }
 
-void WebContentsViewMac::SetOverlayView(
-    WebContentsView* overlay, const gfx::Point& offset) {
-  DCHECK(!underlay_view_);
-  if (overlay_view_)
-    RemoveOverlayView();
-
-  overlay_view_ = static_cast<WebContentsViewMac*>(overlay);
-  DCHECK(!overlay_view_->overlay_view_);
-  overlay_view_->underlay_view_ = this;
-  overlay_view_offset_ = offset;
-  UpdateRenderWidgetHostViewOverlay();
-}
-
-void WebContentsViewMac::RemoveOverlayView() {
-  DCHECK(overlay_view_);
+void WebContentsViewMac::SetAllowOtherViews(bool allow) {
+  if (allow_other_views_ == allow)
+    return;
 
-  RenderWidgetHostViewMac* rwhv = static_cast<RenderWidgetHostViewMac*>(
+  allow_other_views_ = allow;
+  RenderWidgetHostViewMac* view = static_cast<RenderWidgetHostViewMac*>(
       web_contents_->GetRenderWidgetHostView());
-  if (rwhv)
-    rwhv->RemoveOverlayView();
-
-  overlay_view_->underlay_view_ = NULL;
-  overlay_view_ = NULL;
+  if (view)
+    view->SetAllowPauseForResizeOrRepaint(!allow_other_views_);
 }
 
-void WebContentsViewMac::UpdateRenderWidgetHostViewOverlay() {
-  RenderWidgetHostViewMac* rwhv = static_cast<RenderWidgetHostViewMac*>(
-      web_contents_->GetRenderWidgetHostView());
-  if (!rwhv)
-    return;
-
-  if (overlay_view_) {
-    RenderWidgetHostViewMac* overlay_rwhv =
-        static_cast<RenderWidgetHostViewMac*>(
-            overlay_view_->web_contents_->GetRenderWidgetHostView());
-    if (overlay_rwhv)
-      rwhv->SetOverlayView(overlay_rwhv, overlay_view_offset_);
-  }
-
-  if (underlay_view_) {
-    RenderWidgetHostViewMac* underlay_rwhv =
-        static_cast<RenderWidgetHostViewMac*>(
-            underlay_view_->web_contents_->GetRenderWidgetHostView());
-    if (underlay_rwhv)
-      underlay_rwhv->SetOverlayView(rwhv, underlay_view_->overlay_view_offset_);
-  }
+bool WebContentsViewMac::GetAllowOtherViews() const {
+  return allow_other_views_;
 }
 
 void WebContentsViewMac::CreateView(
@@ -356,6 +322,7 @@ RenderWidgetHostViewBase* WebContentsViewMac::CreateViewForWidget(
     view->SetDelegate(rw_delegate.get());
   }
   view->SetAllowOverlappingViews(allow_overlapping_views_);
+  view->SetAllowPauseForResizeOrRepaint(!allow_other_views_);
 
   // Fancy layout comes later; for now just make it our size and resize it
   // with us. In case there are other siblings of the content area, we want
@@ -397,7 +364,6 @@ void WebContentsViewMac::RenderViewCreated(RenderViewHost* host) {
 }
 
 void WebContentsViewMac::RenderViewSwappedIn(RenderViewHost* host) {
-  UpdateRenderWidgetHostViewOverlay();
 }
 
 void WebContentsViewMac::SetOverscrollControllerEnabled(bool enabled) {