Simplify feedback vector creation and store in SharedFunctionInfo.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 707fa44ffc7abbf7ed3597689c21448bed9361ea..821aaf851060b76eaf8d032f59b43bb48e3a6974 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -178,12 +178,14 @@ class CompilationInfo {
     ASSERT(function_ == NULL);
     function_ = literal;
   }
-  // When the scope is applied, we may have deferred work to do on the function.
   void PrepareForCompilation(Scope* scope);
   void SetGlobalScope(Scope* global_scope) {
     ASSERT(global_scope_ == NULL);
     global_scope_ = global_scope;
   }
+  Handle<FixedArray> feedback_vector() const {
+    return feedback_vector_;
+  }
   void SetCode(Handle<Code> code) { code_ = code; }
   void SetExtension(v8::Extension* extension) {
     ASSERT(!is_lazy());
@@ -419,6 +421,9 @@ class CompilationInfo {
   // global script. Will be a null handle otherwise.
   Handle<Context> context_;
 
+  // Used by codegen, ultimately kept rooted by the SharedFunctionInfo.
+  Handle<FixedArray> feedback_vector_;
+
   // Compilation mode flag and whether deoptimization is allowed.
   Mode mode_;
   BailoutId osr_ast_id_;