Add templatized Run() method for Hydrogen phases.

Depends upon https://codereview.chromium.org/17657004

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/18034003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15355 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen.cc

@@ -4014,10 +4014,7 @@ bool HGraph::Optimize(SmartArrayPointer<char>* bailout_reason) {
 
   if (FLAG_use_canonicalizing) Canonicalize();
 
-  if (FLAG_use_gvn) {
-    HGlobalValueNumberingPhase phase(this);
-    phase.Run();
-  }
+  if (FLAG_use_gvn) Run<HGlobalValueNumberingPhase>();
 
   if (FLAG_use_range) {
     HRangeAnalysis rangeAnalysis(this);

src/hydrogen.h

@@ -427,6 +427,9 @@ class HGraph: public ZoneObject {
   HConstant* GetConstant(SetOncePointer<HConstant>* pointer,
                          int32_t integer_value);
 
+  template<class Phase>
+  void Run() { Phase phase(this); phase.Run(); }
+
   void MarkLive(HValue* ref, HValue* instr, ZoneList<HValue*>* worklist);
   void MarkLiveInstructions();
   void RemoveDeadInstructions();