Add missing using statements for JNI types.

base/android/content_uri_utils.cc

 // Copyright 2013 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/content_uri_utils.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "jni/ContentUriUtils_jni.h"
 
 using base::android::ConvertUTF8ToJavaString;
+using base::android::ScopedJavaLocalRef;
 
 namespace base {
 
 bool ContentUriExists(const FilePath& content_uri) {
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jstring> j_uri =
       ConvertUTF8ToJavaString(env, content_uri.value());
   return Java_ContentUriUtils_contentUriExists(
       env, base::android::GetApplicationContext(), j_uri.obj());
 }
@@ skipping 16 matching lines @@
   ScopedJavaLocalRef<jstring> j_mime =
       Java_ContentUriUtils_getMimeType(
           env, base::android::GetApplicationContext(), j_uri.obj());
   if (j_mime.is_null())
     return std::string();
 
   return base::android::ConvertJavaStringToUTF8(env, j_mime.obj());
 }
 
 }  // namespace base