Upgrade to V8 3.4

Merge 3.4.14.35

Simple merge required updates to makefiles only.

Bug: 568872
Change-Id: I403a38452c547e06fcfa951c12eca12a1bc40978
diff --git a/src/variables.cc b/src/variables.cc
index 0502722..67150ea 100644
--- a/src/variables.cc
+++ b/src/variables.cc
@@ -57,32 +57,26 @@
 }
 
 
-Slot* Variable::AsSlot() const {
-  return rewrite_ == NULL ? NULL : rewrite_->AsSlot();
-}
+Slot* Variable::AsSlot() const { return rewrite_; }
 
 
 bool Variable::IsStackAllocated() const {
-  Slot* slot = AsSlot();
-  return slot != NULL && slot->IsStackAllocated();
+  return rewrite_ != NULL && rewrite_->IsStackAllocated();
 }
 
 
 bool Variable::IsParameter() const {
-  Slot* s = AsSlot();
-  return s != NULL && s->type() == Slot::PARAMETER;
+  return rewrite_ != NULL && rewrite_->type() == Slot::PARAMETER;
 }
 
 
 bool Variable::IsStackLocal() const {
-  Slot* s = AsSlot();
-  return s != NULL && s->type() == Slot::LOCAL;
+  return rewrite_ != NULL && rewrite_->type() == Slot::LOCAL;
 }
 
 
 bool Variable::IsContextSlot() const {
-  Slot* s = AsSlot();
-  return s != NULL && s->type() == Slot::CONTEXT;
+  return rewrite_ != NULL && rewrite_->type() == Slot::CONTEXT;
 }