Implementation of the "Redirect URLs to Packaged Apps" feature.

chrome/browser/ui/browser_navigator.cc

 // Copyright (c) 2012 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/browser_navigator.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_about_handler.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/extensions/platform_app_redirector.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_instant_controller.h"
@@ skipping 425 matching lines @@
 
 void Navigate(NavigateParams* params) {
   Browser* source_browser = params->browser;
   if (source_browser)
     params->initiating_profile = source_browser->profile();
   DCHECK(params->initiating_profile);
 
   if (!AdjustNavigateParamsForURL(params))
     return;
 
-  ExtensionService* service = params->initiating_profile->GetExtensionService();
-  if (service)
-    service->ShouldBlockUrlInBrowserTab(&params->url);
+  // See if the extension service wants to block this navigation or some
+  // platform app wants to intercept it.
+  extensions::ExtensionSystem* system =
+      extensions::ExtensionSystem::Get(params->initiating_profile);
+  if (system) {
+    ExtensionService* service = system->extension_service();
+    if (service && service->ShouldBlockUrlInBrowserTab(&params->url)) {
+      // Proceed. The call just rewrites the URL to an error page: we still
+      // have to display it.
+    } else {
+      extensions::PlatformAppRedirector* redirector =
+          system->platform_app_redirector();
+      if (redirector && redirector->MaybeLaunchPlatformAppWithUrl(
+              params->url, params->referrer.url)) {
+        // An app has intercepted the navigation: cancel it here.
+        return;
+      }
+    }
+  }
 
   // The browser window may want to adjust the disposition.
   if (params->disposition == NEW_POPUP &&
       source_browser &&
       source_browser->window()) {
     params->disposition =
         source_browser->window()->GetDispositionForPopupBounds(
             params->window_bounds);
   }
 
@@ skipping 184 matching lines @@
   bool reverse_on_redirect = false;
   content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
       &rewritten_url, browser_context, &reverse_on_redirect);
 
   // Some URLs are mapped to uber subpages. Do not allow them in incognito.
   return !(rewritten_url.scheme() == chrome::kChromeUIScheme &&
            rewritten_url.host() == chrome::kChromeUIUberHost);
 }
 
 }  // namespace chrome