Add DIR_ANDROID_EXTERNAL_STORAGE to base/base_path.h

base/android/path_utils.cc

Index: base/android/path_utils.cc
diff --git a/base/android/path_utils.cc b/base/android/path_utils.cc
index 52fdd8dd61c5ba0e2cf86ed77f2db191f2fbde9f..1e8d1e8308828c74dffb1592a019da5313c2691d 100644
--- a/base/android/path_utils.cc
+++ b/base/android/path_utils.cc
@@ -41,6 +41,13 @@ std::string GetNativeLibraryDirectory() {
   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);
 }