Replace boolean indications of strict mode by an enum value.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 0b843bd45b32eb6d57c1efa86ee784c59290c817..500e38f8daf8d851a9f2f4ef6eac4074a5807064 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -3276,7 +3276,7 @@ void HGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
                                 literal,
                                 name,
                                 value,
-                                function_strict_mode());
+                                function_strict_mode_flag());
             AddInstruction(store);
             AddSimulate(key->id());
           } else {
@@ -3454,7 +3454,7 @@ HInstruction* HGraphBuilder::BuildStoreNamedGeneric(HValue* object,
                          object,
                          name,
                          value,
-                         function_strict_mode());
+                         function_strict_mode_flag());
 }
 
 
@@ -3639,7 +3639,7 @@ void HGraphBuilder::HandleGlobalVariableAssignment(Variable* var,
                                         global_object,
                                         var->name(),
                                         value,
-                                        function_strict_mode());
+                                        function_strict_mode_flag());
     instr->set_position(position);
     AddInstruction(instr);
     ASSERT(instr->HasSideEffects());
@@ -4304,7 +4304,7 @@ HInstruction* HGraphBuilder::BuildStoreKeyedGeneric(HValue* object,
                          object,
                          key,
                          value,
-                         function_strict_mode());
+                         function_strict_mode_flag());
 }
 
 bool HGraphBuilder::TryArgumentsAccess(Property* expr) {