Android: Use external storage for test data.

build/android/pylib/single_test_runner.py

Index: build/android/pylib/single_test_runner.py
diff --git a/build/android/pylib/single_test_runner.py b/build/android/pylib/single_test_runner.py
index c4de68c4d0adfecb4b55446e08ea7cf9e9ed9770..3f56b7b8e682709746512b000e8dc592263d39cf 100644
--- a/build/android/pylib/single_test_runner.py
+++ b/build/android/pylib/single_test_runner.py
@@ -252,13 +252,10 @@ class SingleTestRunner(BaseTestRunner):
     self.tool.CopyFiles()
     test_data = self.GetDataFilesForTestSuite()
     if test_data and not self.fast_and_loose:
-      # Due to the large size of certain test data, we use sdcard to store the
-      # test data and create symbolic links to map them to data/local/tmp/.
-      # Before that, make sure SD card is ready.
+      # Make sure SD card is ready.
       self.adb.WaitForSdCardReady(20)
       for data in test_data:
-        self.CopyTestData([data], '/sdcard/')
-      self.LinkSdCardPathsToTempDir(test_data)
+        self.CopyTestData([data], constants.TEST_DATA_DIR)
 
   def RunTestsWithFilter(self):
     """Runs a tests via a small, temporary shell script."""