QuotaManager: Return the remaining free disk space as quota.

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 90e9215a0ba2250650a62565ffe5d0030ac30a48..54f0119e4843de2cf0552cab4cbdbe8cfdb273a0 100644
--- a/chrome/browser/extensions/extension_special_storage_policy.h
+++ b/chrome/browser/extensions/extension_special_storage_policy.h
@@ -31,6 +31,7 @@ class ExtensionSpecialStoragePolicy : public quota::SpecialStoragePolicy {
   virtual bool IsStorageProtected(const GURL& origin) OVERRIDE;
   virtual bool IsStorageUnlimited(const GURL& origin) OVERRIDE;
   virtual bool IsStorageSessionOnly(const GURL& origin) OVERRIDE;
+  virtual bool IsInstalledApp(const GURL& origin) OVERRIDE;
   virtual bool IsFileHandler(const std::string& extension_id) OVERRIDE;
   virtual bool HasSessionOnlyOrigins() OVERRIDE;
 
@@ -75,6 +76,7 @@ class ExtensionSpecialStoragePolicy : public quota::SpecialStoragePolicy {
 
   base::Lock lock_;  // Synchronize all access to the collections.
   SpecialCollection protected_apps_;
+  SpecialCollection installed_apps_;
   SpecialCollection unlimited_extensions_;
   SpecialCollection file_handler_extensions_;
   scoped_refptr<CookieSettings> cookie_settings_;