Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

chrome/browser/ui/chrome_bubble_manager.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/chrome_bubble_manager.h"
+
+#include "chrome/browser/ui/chrome_web_contents_observer.h"
+#include "content/public/browser/web_contents.h"
+
+ChromeBubbleManager::ChromeBubbleManager() {}
+
+ChromeBubbleManager::~ChromeBubbleManager() {}
+
+void ChromeBubbleManager::ListenToWebContents(
+    content::WebContents* web_contents) {
+  ChromeWebContentsObserver::CreateForWebContents(web_contents);
+  ChromeWebContentsObserver::FromWebContents(web_contents)
+      ->SetBubbleManager(this);
+}
+
+void ChromeBubbleManager::FullscreenToggle(content::WebContents* context) {
+  UpdateMatchingBubbles(context);
+}
+
+void ChromeBubbleManager::TabBlur(content::WebContents* context) {
+  HideMatchingBubbles(context, BUBBLE_CLOSE_TABSWITCH);
+}
+
+void ChromeBubbleManager::TabFocus(content::WebContents* context) {
+  // TODO(hcarmona): Figure out when bubbles should be re-shown.
+  // ShowMatchingBubbles(context);

[please use gerrit instead, 2015/08/05 18:05:25]

Why does ShowMatchingBubbles(context); not work?

[hcarmona, 2015/08/05 18:43:47]

Showing bubbles is easy. Figuring out which bubbles need to be re-shown
is harder.

What if we added a |CloseOnHide| method to the delegate. Then, we can
add an additional |Close| callback to dismiss the bubbles when we won't
be showing them again.

+}
+
+void ChromeBubbleManager::TabDetached(content::WebContents* context) {
+  HideMatchingBubbles(context, BUBBLE_CLOSE_TABSWITCH);
+}
+
+void ChromeBubbleManager::NavigationEntryCommitted(
+    content::WebContents* context,
+    const content::LoadCommittedDetails& details) {
+  // Hide bubbles if the URL changes or the page is refreshed.
+  if (!details.is_in_page ||
+      details.type == content::NAVIGATION_TYPE_SAME_PAGE ||
+      details.type == content::NAVIGATION_TYPE_EXISTING_PAGE) {
+    HideMatchingBubbles(context, BUBBLE_CLOSE_IGNORE);
+  }
+}
+
+void ChromeBubbleManager::WebContentsDestroyed(content::WebContents* context) {
+  HideMatchingBubbles(context, BUBBLE_CLOSE_IGNORE);
+}