[turbofan] Implement OSR for outer loops.

src/compiler/control-builders.cc

Index: src/compiler/control-builders.cc
diff --git a/src/compiler/control-builders.cc b/src/compiler/control-builders.cc
index 8725244ebda11ef4cdf2e6b5e658844efffe364c..2978d8b6484a0fd2f0709b971db14cb3e9b2fc52 100644
--- a/src/compiler/control-builders.cc
+++ b/src/compiler/control-builders.cc
@@ -32,9 +32,8 @@ void IfBuilder::End() {
 }
 
 
-void LoopBuilder::BeginLoop(BitVector* assigned) {
-  builder_->NewLoop();
-  loop_environment_ = environment()->CopyForLoop(assigned);
+void LoopBuilder::BeginLoop(BitVector* assigned, bool is_osr) {
+  loop_environment_ = environment()->CopyForLoop(assigned, is_osr);
   continue_environment_ = environment()->CopyAsUnreachable();
   break_environment_ = environment()->CopyAsUnreachable();
 }