Use StringPiece for UTF string conversions.

base/android/jni_string.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/android/jni_string.h"
 
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 
@@ skipping 16 matching lines @@
   if (!str) {
     LOG(WARNING) << "ConvertJavaStringToUTF8 called with null string.";
     result->clear();
     return;
   }
   // JNI's GetStringUTFChars() returns strings in Java "modified" UTF8, so
   // instead get the String in UTF16 and convert using chromium's conversion
   // function that yields plain (non Java-modified) UTF8.
   const jchar* chars = env->GetStringChars(str, NULL);
   DCHECK(chars);
-  UTF16ToUTF8(chars, env->GetStringLength(str), result);
+  UTF16ToUTF8(base::StringPiece(chars, env->GetStringLength(str)), result);
   env->ReleaseStringChars(str, chars);
   CheckException(env);
 }
 
 std::string ConvertJavaStringToUTF8(JNIEnv* env, jstring str) {
   std::string result;
   ConvertJavaStringToUTF8(env, str, &result);
   return result;
 }
 
@@ skipping 42 matching lines @@
 
 ScopedJavaLocalRef<jstring> ConvertUTF16ToJavaString(
     JNIEnv* env,
     const base::StringPiece16& str) {
   return ScopedJavaLocalRef<jstring>(env,
                                      ConvertUTF16ToJavaStringImpl(env, str));
 }
 
 }  // namespace android
 }  // namespace base