Have Frame::navigationScheduler() return a reference

Source/core/html/parser/HTMLDocumentParser.cpp

Index: Source/core/html/parser/HTMLDocumentParser.cpp
diff --git a/Source/core/html/parser/HTMLDocumentParser.cpp b/Source/core/html/parser/HTMLDocumentParser.cpp
index 072db685711e48bf88767eeff8aff0ecea06b28c..e0dfa89524655f0744cc7d8863a4958c941c38a3 100644
--- a/Source/core/html/parser/HTMLDocumentParser.cpp
+++ b/Source/core/html/parser/HTMLDocumentParser.cpp
@@ -288,7 +288,7 @@ bool HTMLDocumentParser::canTakeNextToken(SynchronousMode mode, PumpSession& ses
     //        parser to stop parsing cleanly.  The problem is we're not
     //        perpared to do that at every point where we run JavaScript.
     if (!isParsingFragment()
-        && document()->frame() && document()->frame()->navigationScheduler()->locationChangePending())
+        && document()->frame() && document()->frame()->navigationScheduler().locationChangePending())
         return false;
 
     if (mode == AllowYield)
@@ -411,7 +411,7 @@ void HTMLDocumentParser::processParsedChunkFromBackgroundParser(PassOwnPtr<Parse
         ASSERT(!isWaitingForScripts());
 
         if (!isParsingFragment()
-            && document()->frame() && document()->frame()->navigationScheduler()->locationChangePending()) {
+            && document()->frame() && document()->frame()->navigationScheduler().locationChangePending()) {
 
             // To match main-thread parser behavior (which never checks locationChangePending on the EOF path)
             // we peek to see if this chunk has an EOF and process it anyway.