Fix presumbit error

src/arm/lithium-arm.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1235 matching lines @@
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedGeneric, "load-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedGeneric)
 
   LOperand* object() const { return input(); }
   Handle<Object> name() const { return hydrogen()->name(); }
 };
 
 
 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)
 
   LOperand* function() const { return input(); }
 };
 
 
 class LLoadElements: public LUnaryOperation {
  public:
@@ skipping 849 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_LITHIUM_ARM_H_