Make BuildBinaryOperation use ReturnValue instead of ReturnInstruction.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 9aa9489aa3f376701f73aa5dc775714ae7d405f1..edbf8aee719d741032c3a3dff9b1e8a81e5a6868 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1338,14 +1338,14 @@ class HGraphBuilder {
                         HValue** operand,
                         HValue** shift_amount);
 
-  HInstruction* BuildBinaryOperation(Token::Value op,
-                                     HValue* left,
-                                     HValue* right,
-                                     Handle<Type> left_type,
-                                     Handle<Type> right_type,
-                                     Handle<Type> result_type,
-                                     Maybe<int> fixed_right_arg,
-                                     bool binop_stub = false);
+  HValue* BuildBinaryOperation(Token::Value op,
+                               HValue* left,
+                               HValue* right,
+                               Handle<Type> left_type,
+                               Handle<Type> right_type,
+                               Handle<Type> result_type,
+                               Maybe<int> fixed_right_arg,
+                               bool binop_stub = false);
 
   HLoadNamedField* AddLoadFixedArrayLength(HValue *object);
 
@@ -2274,9 +2274,9 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
 
   HInstruction* BuildStringCharCodeAt(HValue* string,
                                       HValue* index);
-  HInstruction* BuildBinaryOperation(BinaryOperation* expr,
-                                     HValue* left,
-                                     HValue* right);
+  HValue* BuildBinaryOperation(BinaryOperation* expr,
+                               HValue* left,
+                               HValue* right);
   HInstruction* BuildIncrement(bool returns_original_input,
                                CountOperation* expr);
   HInstruction* BuildLoadKeyedGeneric(HValue* object,