Deoptimize context value in Turbofan (and Crankshaft).

src/deoptimizer.h

Index: src/deoptimizer.h
diff --git a/src/deoptimizer.h b/src/deoptimizer.h
index c5094838e5504d44ec6e0eac983c47890f65c662..4aa6a50c6ef78aa9449ebd010396196776df7e7f 100644
--- a/src/deoptimizer.h
+++ b/src/deoptimizer.h
@@ -922,6 +922,9 @@ class DeoptimizedFrameInfo : public Malloced {
     return function_;
   }
 
+  // Get the frame context.
+  Object* GetContext() { return context_; }
+
   // Check if this frame is preceded by construct stub frame.  The bottom-most
   // inlined frame might still be called by an uninlined construct stub.
   bool HasConstructStub() {
@@ -958,6 +961,7 @@ class DeoptimizedFrameInfo : public Malloced {
   }
 
   JSFunction* function_;
+  Object* context_;
   bool has_construct_stub_;
   int parameters_count_;
   int expression_count_;