Close the media picker window when DesktopMediaPickerController is destructed.

BUG=383999

Review URL: https://codereview.chromium.org/336833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277914 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/media_picker/desktop_media_picker_controller.mm

@@ -85,6 +85,7 @@ const int kExcessButtonPadding = 6;
   [cancelButton_ setTarget:nil];
   [sourceBrowser_ setDelegate:nil];
   [sourceBrowser_ setDataSource:nil];
+  [[self window] close];
   [super dealloc];
 }