HTML Imports: Get rid of needsProcessOrStop() from dom/custom/

Source/core/dom/custom/CustomElementMicrotaskStep.h

Index: Source/core/dom/custom/CustomElementMicrotaskStep.h
diff --git a/Source/core/dom/custom/CustomElementMicrotaskStep.h b/Source/core/dom/custom/CustomElementMicrotaskStep.h
index d4678cda25803f9a863f253b25bf30907281ffbf..4e5ae77636e437b3a9e883c88676bf5ab1aac010 100644
--- a/Source/core/dom/custom/CustomElementMicrotaskStep.h
+++ b/Source/core/dom/custom/CustomElementMicrotaskStep.h
@@ -42,13 +42,11 @@ public:
     virtual ~CustomElementMicrotaskStep() { }
 
     enum Result {
-        ContinueWithRemoving = 0,
-        ShouldStop           = 1 << 0,
-        ShouldRemain         = 1 << 1
+        Processing,
+        FinishedProcessing
     };
 
     virtual Result process() = 0;
-    virtual bool needsProcessOrStop() const = 0;
 
 #if !defined(NDEBUG)
     virtual void show(unsigned indent) = 0;