Makes notifications animate from the bottom of the screen (as was

chrome/browser/notifications/balloon.cc

Index: chrome/browser/notifications/balloon.cc
diff --git a/chrome/browser/notifications/balloon.cc b/chrome/browser/notifications/balloon.cc
index c0c2f4b2aff44cd2c8c5f8d1bf1a43e734b2c30d..9553978b0196361dbf52676b52b24b3ddc4838e9 100644
--- a/chrome/browser/notifications/balloon.cc
+++ b/chrome/browser/notifications/balloon.cc
@@ -10,6 +10,14 @@
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
+#if !defined(OS_WIN) && !defined(USE_AURA)
+// static
+int BalloonView::GetHorizontalMargin() {
+  // TODO: implement for linux (non-aura) and mac.
+  return 0;
+}
+#endif
+
 Balloon::Balloon(const Notification& notification, Profile* profile,
                  BalloonCollection* collection)
     : profile_(profile),