mac: ensure ui::Compositor exists for visible RWHVs

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 6b759cee848fc22a310e525221104b0a0af13b9c..2e7c96a271b31787425f3e20b74f2fb7bd7c047c 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -597,6 +597,9 @@ RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget,
         ->GetInputEventRouter()
         ->AddSurfaceIdNamespaceOwner(GetSurfaceIdNamespace(), this);
   }
+
+  if (!render_widget_host_->is_hidden())
+    EnsureBrowserCompositorView();
 }
 
 RenderWidgetHostViewMac::~RenderWidgetHostViewMac() {
@@ -887,8 +890,6 @@ RenderWidgetHost* RenderWidgetHostViewMac::GetRenderWidgetHost() const {
 void RenderWidgetHostViewMac::Show() {
   ScopedCAActionDisabler disabler;
   [cocoa_view_ setHidden:NO];
-  if (!render_widget_host_->is_hidden())
-    return;
 
   // Re-create the browser compositor. If the DelegatedFrameHost has a cached
   // frame from the last time it was visible, then it will immediately be
@@ -896,6 +897,9 @@ void RenderWidgetHostViewMac::Show() {
   // frame is swapped.
   EnsureBrowserCompositorView();
 
+  if (!render_widget_host_->is_hidden())
+    return;
+
   WasUnOccluded();
 
   // If there is not a frame being currently drawn, kick one, so that the below