Show a warning bubble when the IME extension is activated.

chrome/browser/ui/browser_window.h

Index: chrome/browser/ui/browser_window.h
diff --git a/chrome/browser/ui/browser_window.h b/chrome/browser/ui/browser_window.h
index 5932af52998d5231d157986691275e53325e200f..05559a236cd3bc7a0a9a4aaa4ab1c75467d178c4 100644
--- a/chrome/browser/ui/browser_window.h
+++ b/chrome/browser/ui/browser_window.h
@@ -66,6 +66,8 @@ namespace web_modal {
 class WebContentsModalDialogHost;
 }
 
+enum class ImeWarningBubblePermissionStatus;
+
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserWindow interface
 //  An interface implemented by the "view" of the Browser window.
@@ -379,6 +381,12 @@ class BrowserWindow : public ui::BaseWindow {
   // Returns object implementing ExclusiveAccessContext interface.
   virtual ExclusiveAccessContext* GetExclusiveAccessContext() = 0;
 
+  // Shows the IME warning bubble.
+  virtual void ShowImeWarningBubble(
+      const extensions::Extension* extension,
+      const base::Callback<void(ImeWarningBubblePermissionStatus status)>&
+          callback) = 0;
+
  protected:
   friend class BrowserCloseManager;
   friend class BrowserView;