Add DIR_ANDROID_EXTERNAL_STORAGE to base/base_path.h

base/android/path_utils.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/path_utils.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 
@@ skipping 23 matching lines @@
   return ConvertJavaStringToUTF8(path);
 }
 
 std::string GetNativeLibraryDirectory() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jstring> path =
       Java_PathUtils_getNativeLibraryDirectory(env, GetApplicationContext());
   return ConvertJavaStringToUTF8(path);
 }
 
+std::string GetExternalStorageDirectory() {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> path =
+      Java_PathUtils_getExternalStorageDirectory(env);
+  return ConvertJavaStringToUTF8(path);
+}
+
 bool RegisterPathUtils(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace base