Show apps protecting local data in chrome://settings/cookies.

chrome/browser/extensions/extension_special_storage_policy.h

Index: chrome/browser/extensions/extension_special_storage_policy.h
diff --git a/chrome/browser/extensions/extension_special_storage_policy.h b/chrome/browser/extensions/extension_special_storage_policy.h
index 3d35568f7d48e730e31287e96ffeed5a0be3a30e..4a0789d1ddd0630aafd2fe670a03f217980d4bf7 100644
--- a/chrome/browser/extensions/extension_special_storage_policy.h
+++ b/chrome/browser/extensions/extension_special_storage_policy.h
@@ -10,6 +10,7 @@
 #include <string>
 
 #include "base/synchronization/lock.h"
+#include "chrome/common/extensions/extension_set.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/quota/special_storage_policy.h"
 
@@ -42,6 +43,10 @@ class ExtensionSpecialStoragePolicy : public quota::SpecialStoragePolicy {
   // Decides whether the storage for |extension|'s web extent needs protection.
   bool NeedsProtection(const extensions::Extension* extension);
 
+  // Returns the set of extensions protecting this origin. The caller does not
+  // take ownership of the return value.
+  const ExtensionSet* ExtensionsProtectingOrigin(const GURL& origin);
+
  protected:
   virtual ~ExtensionSpecialStoragePolicy();
 
@@ -52,16 +57,18 @@ class ExtensionSpecialStoragePolicy : public quota::SpecialStoragePolicy {
     ~SpecialCollection();
 
     bool Contains(const GURL& origin);
+    const ExtensionSet* ExtensionsContaining(const GURL& origin);
     bool ContainsExtension(const std::string& extension_id);
     void Add(const extensions::Extension* extension);
     void Remove(const extensions::Extension* extension);
     void Clear();
 
    private:
-    typedef std::map<GURL, bool> CachedResults;
-    typedef std::map<std::string, scoped_refptr<const extensions::Extension> >
-        Extensions;
-    Extensions extensions_;
+    typedef std::map<GURL, ExtensionSet*> CachedResults;
+
+    void ClearCache();
+
+    ExtensionSet extensions_;
     CachedResults cached_results_;
   };