Settings Overides -- warn user when extensions override their NTP.

chrome/browser/ui/views/settings_api_bubble_helper_views.cc

Index: chrome/browser/ui/views/settings_api_bubble_helper_views.cc
diff --git a/chrome/browser/ui/views/settings_api_bubble_helper_views.cc b/chrome/browser/ui/views/settings_api_bubble_helper_views.cc
index 6dadb98b50bcd581fe493c102420661458460631..67199cdb782e7a079c5d2c7e0a4ddb2457f45f5f 100644
--- a/chrome/browser/ui/views/settings_api_bubble_helper_views.cc
+++ b/chrome/browser/ui/views/settings_api_bubble_helper_views.cc
@@ -4,15 +4,20 @@
 
 #include "chrome/browser/ui/views/settings_api_bubble_helper_views.h"
 
+#include "chrome/browser/extensions/ntp_overridden_bubble_controller.h"
 #include "chrome/browser/extensions/settings_api_bubble_controller.h"
 #include "chrome/browser/extensions/settings_api_helpers.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/views/extensions/extension_message_bubble_view.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/settings_api_bubble_helper_views.h"
 #include "chrome/browser/ui/views/toolbar/home_button.h"
 #include "chrome/browser/ui/views/toolbar/toolbar_view.h"
 #include "chrome/common/extensions/manifest_handlers/settings_overrides_handler.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/browser_url_handler.h"
+#include "content/public/browser/navigation_entry.h"
 
 namespace {
 
@@ -70,7 +75,7 @@ void MaybeShowExtensionControlledSearchNotification(
 
   if (AutocompleteMatch::IsSearchType(match.type) &&
       match.type != AutocompleteMatchType::SEARCH_OTHER_ENGINE) {
-    const extensions::Extension* extension =
+    const Extension* extension =
         OverridesSearchEngine(profile, NULL);
     if (extension) {
       ToolbarView* toolbar =
@@ -85,4 +90,44 @@ void MaybeShowExtensionControlledSearchNotification(
   }
 }
 
+void MaybeShowExtensionControlledNewTabPage(
+    Browser* browser, content::WebContents* web_contents) {
+#if !defined(OS_WIN)
+  return;
+#endif
+
+  content::NavigationEntry* entry =
+      web_contents->GetController().GetActiveEntry();
+  if (!entry)
+    return;
+  GURL active_url = entry->GetURL();
+  if (!active_url.SchemeIs("chrome-extension"))
+    return;  // Not a URL that we care about.
+
+  // See if the current active URL matches a transformed NewTab URL.
+  GURL ntp_url(chrome::kChromeUINewTabURL);
+  bool ignored_param;
+  content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
+      &ntp_url,
+      web_contents->GetBrowserContext(),
+      &ignored_param);
+  if (ntp_url != active_url)
+    return;  // Not being overridden by an extension.
+
+  scoped_ptr<NtpOverriddenBubbleController> ntp_overridden_bubble(
+      new NtpOverriddenBubbleController(browser->profile()));
+  if (!ntp_overridden_bubble->ShouldShow(ntp_url.host()))
+    return;
+
+  NtpOverriddenBubbleController* controller = ntp_overridden_bubble.get();
+  ExtensionMessageBubbleView* bubble_delegate =
+      new ExtensionMessageBubbleView(
+          BrowserView::GetBrowserViewForBrowser(browser)->toolbar()->app_menu(),
+          views::BubbleBorder::TOP_RIGHT,
+          ntp_overridden_bubble.PassAs<
+              ExtensionMessageBubbleController>());
+  views::BubbleDelegateView::CreateBubble(bubble_delegate);
+  controller->Show(bubble_delegate);
+}
+
 }  // namespace extensions