Adjust web notification tray height.

TBR=jennyz@chromium.org
BUG=141744

Review URL: https://chromiumcodereview.appspot.com/10832238

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150953 0039d316-1c4b-4281-b951-d872f2087c98

ash/system/web_notification/web_notification_tray.cc

@@ -43,7 +43,7 @@ const int kTrayContainerHorizontalPaddingVerticalAlignment = 0;
 const int kPaddingFromLeftEdgeOfSystemTrayBottomAlignment = 8;
 const int kPaddingFromTopEdgeOfSystemTrayVerticalAlignment = 10;
 const int kTrayWidth = 40;
-const int kTrayHeight = 32;
+const int kTrayHeight = 31;
 const int kTraySideWidth = 32;
 const int kTraySideHeight = 24;