Display extension name on device chooser title

chrome/browser/chooser_controller/chooser_controller.h

Index: chrome/browser/chooser_controller/chooser_controller.h
diff --git a/chrome/browser/chooser_controller/chooser_controller.h b/chrome/browser/chooser_controller/chooser_controller.h
index 275f02431810e363f886b54a0fced92cc7ae5263..2982e0168804e4a383ec5a1099556191eea81534 100644
--- a/chrome/browser/chooser_controller/chooser_controller.h
+++ b/chrome/browser/chooser_controller/chooser_controller.h
@@ -52,8 +52,8 @@ class ChooserController {
     virtual ~Observer() {}
   };
 
-  // Return the origin URL to be displayed on the chooser title.
-  url::Origin GetOrigin() const;
+  // Returns the text to be displayed in the chooser title.
+  base::string16 GetTitle();
 
   // The number of options users can pick from. For example, it can be
   // the number of USB/Bluetooth device names which are listed in the
@@ -82,8 +82,13 @@ class ChooserController {
   void set_observer(Observer* observer) { observer_ = observer; }
   Observer* observer() const { return observer_; }
 
+ protected:
+  // Return the title prefix to be displayed on the chooser.
+  base::string16 GetTitlePrefix();
+
  private:
   content::RenderFrameHost* owning_frame_;
+  bool title_prefix_has_quote_ = true;
   Observer* observer_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(ChooserController);