Fix valgrind warnings.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index af9459566dd06f862e38a7837d4c60ab4d62fabc..62eedc268fdf96843725228b9197a80221b73c23 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -293,6 +293,8 @@ class CompilationInfo {
 // Zone on construction and deallocates it on exit.
 class CompilationInfoWithZone: public CompilationInfo {
  public:
+  INLINE(void* operator new(size_t size)) { return Malloced::New(size); }

[Yang, 2012/11/23 15:46:20]

We use a SmartPointer to delete CompilationInfoWithZone that are allocated on
the heap, and SmartPointer uses Malloced::Delete, so here we use its counterpart
to make valgrind happy.

+
   explicit CompilationInfoWithZone(Handle<Script> script)
       : CompilationInfo(script, &zone_),
         zone_(script->GetIsolate()),