Android: Use external storage for test data.

base/base_paths_android.cc

Index: base/base_paths_android.cc
diff --git a/base/base_paths_android.cc b/base/base_paths_android.cc
index 449b731713cbd157ad39c58da14330de5fa143a7..92d269ac04ef9cc91ccc32f2ebdcb2c202555744 100644
--- a/base/base_paths_android.cc
+++ b/base/base_paths_android.cc
@@ -43,9 +43,8 @@ bool PathProviderAndroid(int key, FilePath* result) {
       return true;
     }
     case base::DIR_SOURCE_ROOT: {
-      // This const is only used for tests. Files in this directory are pushed
-      // to the device via test script.
-      *result = FilePath(FILE_PATH_LITERAL("/data/local/tmp/"));
+      // This const is only used for tests.
+      *result = FilePath(base::android::GetExternalStorageDirectory());
       return true;
     }
     case base::DIR_CACHE: {