Support tracking focused element for OOPIFs.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index e60508ab3d021c25232001e92441bbee5457a4c6..46f67d2112c160f546a907cb463f7159c339173d 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -185,7 +185,13 @@ class WinScreenKeyboardObserver : public ui::OnScreenKeyboardObserver {
       // We want to scroll the node into a rectangle which originates from
       // the touch point and a small offset (10) in either direction.
       gfx::Rect node_rect(origin.x(), origin.y(), 10, 10);
-      host_->ScrollFocusedEditableNodeIntoRect(node_rect);
+      RenderWidgetHostImpl* host = host_;
+      if (host->delegate()) {
+        host = host->delegate()->GetFocusedRenderWidgetHost(host);
+      }
+      // TODO(ekaramad): This will not scroll the <iframe> up. Also not
+      // implemented for OOPIFs (https://crbug.com/676037).
+      host->ScrollFocusedEditableNodeIntoRect(node_rect);
     }
   }
 
@@ -780,7 +786,7 @@ void RenderWidgetHostViewAura::FocusedNodeTouched(
   ui::OnScreenKeyboardDisplayManager* osk_display_manager =
       ui::OnScreenKeyboardDisplayManager::GetInstance();
   DCHECK(osk_display_manager);
-  if (editable && host_ && host_->GetView()) {
+  if (editable && host_ && host_->GetView() && host_->delegate()) {
     keyboard_observer_.reset(new WinScreenKeyboardObserver(
         host_, location_dips_screen, device_scale_factor_, window_));
     virtual_keyboard_requested_ =