Fix presumbit error

TBR=karlklose@chromium.org
Review URL: http://codereview.chromium.org/6046012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6164 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-arm.h

@@ -1253,7 +1253,8 @@ class LLoadNamedGeneric: public LUnaryOperation {
 
 class LLoadFunctionPrototype: public LUnaryOperation {
  public:
-  LLoadFunctionPrototype(LOperand* function) : LUnaryOperation(function) { }
+  explicit LLoadFunctionPrototype(LOperand* function)
+      : LUnaryOperation(function) { }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype, "load-function-prototype")
   DECLARE_HYDROGEN_ACCESSOR(LoadFunctionPrototype)