base: Fix minor warnings reported by cppcheck.

base/json/json_value_converter_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/json/json_value_converter.h"
 
 #include <string>
 #include <vector>
 
 #include "base/values.h"
@@ skipping 11 matching lines @@
   enum SimpleEnum {
     FOO, BAR,
   };
   int foo;
   std::string bar;
   bool baz;
   bool bstruct;
   SimpleEnum simple_enum;
   ScopedVector<int> ints;
   ScopedVector<std::string> string_values;
-  SimpleMessage() : foo(0), baz(false), bstruct(false) {}
+  SimpleMessage() : foo(0), baz(false), bstruct(false), simple_enum(FOO) {}
 
   static bool ParseSimpleEnum(const StringPiece& value, SimpleEnum* field) {
     if (value == "foo") {
       *field = FOO;
       return true;
     } else if (value == "bar") {
       *field = BAR;
       return true;
     }
     return false;
@@ skipping 204 matching lines @@
       "}\n";
 
   scoped_ptr<Value> value(base::JSONReader::Read(normal_data));
   SimpleMessage message;
   base::JSONValueConverter<SimpleMessage> converter;
   EXPECT_FALSE(converter.Convert(*value.get(), &message));
   // No check the values as mentioned above.
 }
 
 }  // namespace base