Cleanup namespace usage in Source/core/{dom/* & fileapi/*}

Source/core/dom/VisitedLinkState.cpp

Index: Source/core/dom/VisitedLinkState.cpp
diff --git a/Source/core/dom/VisitedLinkState.cpp b/Source/core/dom/VisitedLinkState.cpp
index a05689525587acd44f0b7b8715c234e3df880a88..4f83485da0e3b3f8ea0b7109233123d8ff1d4bdd 100644
--- a/Source/core/dom/VisitedLinkState.cpp
+++ b/Source/core/dom/VisitedLinkState.cpp
@@ -99,7 +99,7 @@ EInsideLink VisitedLinkState::determineLinkStateSlowCase(const Element& element)
 
     if (LinkHash hash = linkHashForElement(element, attribute)) {
         m_linksCheckedForVisitedState.add(hash);
-        if (blink::Platform::current()->isLinkVisited(hash))
+        if (Platform::current()->isLinkVisited(hash))
             return InsideVisitedLink;
     }
 
@@ -111,4 +111,4 @@ void VisitedLinkState::trace(Visitor* visitor)
     visitor->trace(m_document);
 }
 
-}
+} // namespace blink