Make platform apps get isolated storage by default.

chrome/common/extensions/extension.cc

Index: chrome/common/extensions/extension.cc
diff --git a/chrome/common/extensions/extension.cc b/chrome/common/extensions/extension.cc
index c26f225f585f046f4ccdedca419c85d46b7ed19c..4559943dc2139d55b1fcabbef995e92ee8488419 100644
--- a/chrome/common/extensions/extension.cc
+++ b/chrome/common/extensions/extension.cc
@@ -2693,7 +2693,21 @@ bool Extension::LoadContentSecurityPolicy(string16* error) {
   return true;
 }
 
-bool Extension::LoadAppIsolation(string16* error) {
+bool Extension::LoadAppIsolation(
+    const ExtensionAPIPermissionSet& api_permissions, string16* error) {
+  // Platform apps always get isolated storage.
+  if (is_platform_app()) {
+    is_storage_isolated_ = true;
+    return true;
+  }
+
+  // Other apps only get it if it is requested _and_ experimental APIs are
+  // enabled.
+  if (!api_permissions.count(ExtensionAPIPermission::kExperimental) ||
+      !is_app()) {
+    return true;
+  }
+
   Value* temp = NULL;
   if (!manifest_->Get(keys::kIsolation, &temp))
     return true;
@@ -3080,9 +3094,7 @@ bool Extension::InitFromValue(int flags, string16* error) {
     return false;
   }
 
-  // App isolation.
-  if (api_permissions.count(ExtensionAPIPermission::kExperimental) &&
-      is_app() && !LoadAppIsolation(error))
+  if (!LoadAppIsolation(api_permissions, error))
     return false;
 
   if (!LoadSharedFeatures(api_permissions, error))