An experimental fix for Bug 49590.

This change just releases the BalloonController objects used in the tests. (This change does not use autorelease since I'm not sure if we can call autorelease before initializing an NSObject.)

BUG=49590
TEST=make the "Chromium Mac (valgrind)" bot greener.
Review URL: http://codereview.chromium.org/2808056

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@53921 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/cocoa/notifications/balloon_controller_unittest.mm

@@ -78,6 +78,7 @@ TEST_F(BalloonControllerTest, ShowAndCloseTest) {
   [controller closeBalloon:YES];
 
   [mock verify];
+  [controller release];
 }
 
 TEST_F(BalloonControllerTest, SizesTest) {
@@ -98,6 +99,7 @@ TEST_F(BalloonControllerTest, SizesTest) {
   EXPECT_TRUE([controller desiredTotalWidth] > 100);
   EXPECT_TRUE([controller desiredTotalHeight] > 100);
   [mock verify];
+  [controller release];
 }
 
 }