Make activities have a thick border when in overview mode part 1

athena/test/sample_activity.cc

Index: athena/test/sample_activity.cc
diff --git a/athena/test/sample_activity.cc b/athena/test/sample_activity.cc
index 8e36ea069bc3ae336b8f8798498749365f77bb88..7c052a56ce3da4bed13a9c3e7e978aa3cf57850e 100644
--- a/athena/test/sample_activity.cc
+++ b/athena/test/sample_activity.cc
@@ -80,5 +80,11 @@ gfx::ImageSkia SampleActivity::GetOverviewModeImage() {
   return gfx::ImageSkia();
 }
 
+void SampleActivity::PrepareContentsForOverview() {
+}
+
+void SampleActivity::ResetContentsView() {
+}
+
 }  // namespace test
 }  // namespace athena