Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index ac738adafae528c8c6d15f2d785af3f18df44531..f7b71f64c82c67bb1710bbf1a7065fe30e53157d 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -1760,6 +1760,7 @@ void Browser::RegisterProtocolHandler(WebContents* web_contents,
   PermissionBubbleManager* bubble_manager =
       PermissionBubbleManager::FromWebContents(web_contents);
   if (PermissionBubbleManager::Enabled() && bubble_manager) {
+    bubble_manager->SetBrowser(this);
     bubble_manager->AddRequest(
         new RegisterProtocolHandlerPermissionRequest(registry, handler,
                                                      url, user_gesture));