Fix Windows build after r23000.

TBR=titzer@chromium.org

Review URL: https://codereview.chromium.org/451053003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23002 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/pipeline.cc

@@ -87,7 +87,7 @@ class AstGraphBuilderWithPositions : public AstGraphBuilder {
                                         SourcePositionTable* source_positions)
       : AstGraphBuilder(info, jsgraph), source_positions_(source_positions) {}
 
-  bool CreateGraph() V8_OVERRIDE {
+  bool CreateGraph() {
     SourcePositionTable::Scope pos(source_positions_,
                                    SourcePosition::Unknown());
     return AstGraphBuilder::CreateGraph();