Add functions to let tests read and control the Bluetooth chooser state.

content/shell/browser/shell.h

Index: content/shell/browser/shell.h
diff --git a/content/shell/browser/shell.h b/content/shell/browser/shell.h
index cf461712b130146f79d93233482713c36671b8ce..f6dfe1be0e6104bd0e0b6bbc54ad7cd1f394670b 100644
--- a/content/shell/browser/shell.h
+++ b/content/shell/browser/shell.h
@@ -135,6 +135,10 @@ class Shell : public WebContentsDelegate,
   void DidNavigateMainFramePostCommit(WebContents* web_contents) override;
   JavaScriptDialogManager* GetJavaScriptDialogManager(
       WebContents* source) override;
+  scoped_ptr<BluetoothChooser> RunBluetoothChooser(
+      WebContents* web_contents,
+      const BluetoothChooser::EventHandler& event_handler,
+      const GURL& origin) override;
 #if defined(OS_MACOSX)
   void HandleKeyboardEvent(WebContents* source,
                            const NativeWebKeyboardEvent& event) override;