Add option to push files to device using isolate for instrumentation tests.

build/android/pylib/base/base_test_runner.py

Index: build/android/pylib/base/base_test_runner.py
diff --git a/build/android/pylib/base/base_test_runner.py b/build/android/pylib/base/base_test_runner.py
index 6e51b43333a0399e49bf23b7f9c73f9670d4fda9..4e2eae70427c4d967d7081bf3afe6a92739edd0a 100644
--- a/build/android/pylib/base/base_test_runner.py
+++ b/build/android/pylib/base/base_test_runner.py
@@ -70,14 +70,9 @@ class BaseTestRunner(object):
     """Installs the test package once before all tests are run."""
     pass
 
-  def PushDataDeps(self):
-    """Push all data deps to device once before all tests are run."""
-    pass
-
   def SetUp(self):
     """Run once before all tests are run."""
     self.InstallTestPackage()
-    self.PushDataDeps()
 
   def TearDown(self):
     """Run once after all tests are run."""