gin: Use V8 Maybe APIs

gin/modules/module_registry.h

Index: gin/modules/module_registry.h
diff --git a/gin/modules/module_registry.h b/gin/modules/module_registry.h
index 439207eaf3f51e6f6a590125567cc61c91904e46..7050a5a38361f4851865db79d7352aa00d33ad29 100644
--- a/gin/modules/module_registry.h
+++ b/gin/modules/module_registry.h
@@ -47,7 +47,7 @@ class GIN_EXPORT ModuleRegistry {
 
   // Installs the necessary functions needed for modules.
   // WARNING: this may execute script in the page.
-  static void InstallGlobals(v8::Isolate* isolate, v8::Handle<v8::Object> obj);
+  static bool InstallGlobals(v8::Isolate* isolate, v8::Handle<v8::Object> obj);
 
   void AddObserver(ModuleRegistryObserver* observer);
   void RemoveObserver(ModuleRegistryObserver* observer);
@@ -81,8 +81,8 @@ class GIN_EXPORT ModuleRegistry {
 
   explicit ModuleRegistry(v8::Isolate* isolate);
 
-  void Load(v8::Isolate* isolate, scoped_ptr<PendingModule> pending);
-  void RegisterModule(v8::Isolate* isolate,
+  bool Load(v8::Isolate* isolate, scoped_ptr<PendingModule> pending);
+  bool RegisterModule(v8::Isolate* isolate,
                       const std::string& id,
                       v8::Handle<v8::Value> module);