Migrate accessibility from RenderView to RenderFrame.

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 a4ae9c6580ba7da5c6cd4950e0c0b638ccb6b336..1740527532b15fcfe5b0cdec8ce95dd3e8578ab5 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -2062,13 +2062,14 @@ void RenderWidgetHostViewMac::SetBackground(const SkBitmap& background) {
         render_widget_host_->GetRoutingID(), background));
 }
 
-void RenderWidgetHostViewMac::CreateBrowserAccessibilityManagerIfNeeded() {
+void RenderWidgetHostViewMac::CreateBrowserAccessibilityManagerIfNeeded(
+    BrowserAccessibilityDelegate* delegate) {
   if (!GetBrowserAccessibilityManager()) {
     SetBrowserAccessibilityManager(
         new BrowserAccessibilityManagerMac(
             cocoa_view_,
             BrowserAccessibilityManagerMac::GetEmptyDocument(),
-            render_widget_host_));
+            delegate));
   }
 }