Teach SkyView how to load the main script

sky/engine/core/script/dart_controller.h

Index: sky/engine/core/script/dart_controller.h
diff --git a/sky/engine/core/script/dart_controller.h b/sky/engine/core/script/dart_controller.h
index 2266a8d7c8728f8266b59bfa3658272b68e818ea..ece69b2eb61ece97fab387395850959cfee0ad92 100644
--- a/sky/engine/core/script/dart_controller.h
+++ b/sky/engine/core/script/dart_controller.h
@@ -7,6 +7,7 @@
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "dart/runtime/include/dart_api.h"
 #include "sky/engine/wtf/OwnPtr.h"
 #include "sky/engine/wtf/text/AtomicString.h"
@@ -19,6 +20,7 @@ class DOMDartState;
 class DartValue;
 class Document;
 class HTMLScriptElement;
+class KURL;
 
 class DartController {
  public:
@@ -30,6 +32,8 @@ class DartController {
   typedef base::Callback<void(RefPtr<AbstractModule>, RefPtr<DartValue>)>
       LoadFinishedCallback;
 
+  void LoadMainLibrary(const KURL& url);
+
   void LoadScriptInModule(AbstractModule* module,
                           const String& source,
                           const TextPosition& textPosition,
@@ -49,9 +53,13 @@ class DartController {
                             const String& source,
                             const TextPosition& position);
 
+  void DidLoadMainLibrary(KURL url);
+
   OwnPtr<DOMDartState> dom_dart_state_;
   OwnPtr<BuiltinSky> builtin_sky_;
 
+  base::WeakPtrFactory<DartController> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(DartController);
 };