[reland] Browser Side Text Input State Tracking for OOPIF (Aura Only)

content/browser/frame_host/interstitial_page_impl.h

Index: content/browser/frame_host/interstitial_page_impl.h
diff --git a/content/browser/frame_host/interstitial_page_impl.h b/content/browser/frame_host/interstitial_page_impl.h
index d7fc93d4782bcde16073886d07ea0afd89dce3e1..9d3ed241ec0820b7adff3c0b1839358e82887568 100644
--- a/content/browser/frame_host/interstitial_page_impl.h
+++ b/content/browser/frame_host/interstitial_page_impl.h
@@ -30,6 +30,7 @@ class NavigationEntry;
 class NavigationControllerImpl;
 class RenderViewHostImpl;
 class RenderWidgetHostView;
+class TextInputManager;
 class WebContentsView;
 
 enum ResourceRequestAction {
@@ -160,6 +161,7 @@ class CONTENT_EXPORT InterstitialPageImpl
   bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                               bool* is_keyboard_shortcut) override;
   void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) override;
+  TextInputManager* GetTextInputManager() override;
 
   bool enabled() const { return enabled_; }
   WebContents* web_contents() const;