Decouple ScriptPromise creation from ScriptPromiseResolver.

Source/bindings/v8/ScriptPromise.h

Index: Source/bindings/v8/ScriptPromise.h
diff --git a/Source/bindings/v8/ScriptPromise.h b/Source/bindings/v8/ScriptPromise.h
index c4f3e5dd07f88e8295eb7265bb111c55e873b965..4acdaad7e170b86427e44d6a04020203df1690fd 100644
--- a/Source/bindings/v8/ScriptPromise.h
+++ b/Source/bindings/v8/ScriptPromise.h
@@ -38,6 +38,8 @@
 
 namespace WebCore {
 
+class ExecutionContext;
+
 // ScriptPromise is the class for representing Promise values in C++ world.
 // ScriptPromise holds a Promise.
 // So holding a ScriptPromise as a member variable in DOM object causes
@@ -45,6 +47,7 @@ namespace WebCore {
 //
 class ScriptPromise {
 public:
+    // Constructs an empty promise.
     ScriptPromise()
         : m_promise()
     {
@@ -92,6 +95,11 @@ public:
         m_promise.clear();
     }
 
+    // Creates a pending promise.

[abarth-chromium, 2013/10/15 17:40:51]

These comments aren't needed anymore.  We can see from the name what it does.

+    static ScriptPromise createPending();
+    // Creates a pending promise.
+    static ScriptPromise createPending(ExecutionContext*);
+
 private:
     ScriptValue m_promise;
 };