Simplify feedback vector creation and store in SharedFunctionInfo.

src/full-codegen.h

Index: src/full-codegen.h
diff --git a/src/full-codegen.h b/src/full-codegen.h
index a6dcf5babc5ffb13de268fd0db17c46f5810fbe7..5d7d8191b376d653797ef1538069db633bc74713 100644
--- a/src/full-codegen.h
+++ b/src/full-codegen.h
@@ -442,12 +442,9 @@ class FullCodeGenerator: public AstVisitor {
   // Feedback slot support. The feedback vector will be cleared during gc and
   // collected by the type-feedback oracle.
   Handle<FixedArray> FeedbackVector() {
-    return feedback_vector_;
+    return info_->feedback_vector();
   }
-  void StoreFeedbackVectorSlot(int slot, Handle<Object> object) {
-    feedback_vector_->set(slot, *object);
-  }
-  void InitializeFeedbackVector();
+  void EnsureSlotContainsAllocationSite(int slot);
 
   // Record a call's return site offset, used to rebuild the frame if the
   // called function was inlined at the site.
@@ -849,7 +846,6 @@ class FullCodeGenerator: public AstVisitor {
   ZoneList<BackEdgeEntry> back_edges_;
   int ic_total_count_;
   Handle<FixedArray> handler_table_;
-  Handle<FixedArray> feedback_vector_;
   Handle<Cell> profiling_counter_;
   bool generate_debug_code_;