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

chrome/common/extensions/extension_set.h

Index: chrome/common/extensions/extension_set.h
diff --git a/chrome/common/extensions/extension_set.h b/chrome/common/extensions/extension_set.h
index a34b8c7b75c0f7a53ba5c3b03b5a69b7ce6bd7d8..2f307249224cf65da41b720fb119ed60e543e936 100644
--- a/chrome/common/extensions/extension_set.h
+++ b/chrome/common/extensions/extension_set.h
@@ -15,6 +15,10 @@
 #include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
 
+namespace extensions {
+struct UrlHandlerInfo;
+};
+
 class ExtensionURLInfo {
  public:
   // The extension system uses both a document's origin and its URL to
@@ -117,6 +121,11 @@ class ExtensionSet {
   const extensions::Extension* GetHostedAppByOverlappingWebExtent(
       const extensions::URLPatternSet& extent) const;
 
+  // Returns a platform app that's registered itself for handling of a URL
+  // pattern that matches |url|. If none, returns NULL.
+  const extensions::UrlHandlerInfo*
+  GetHandlingAppForURL(const GURL& url) const;
+
   // Returns true if |new_url| is in the extent of the same extension as
   // |old_url|.  Also returns true if neither URL is in an app.
   bool InSameExtent(const GURL& old_url, const GURL& new_url) const;