[Mac] Stop listening for NSWindowWillCloseNotification in |-dealloc| to fix a crash.

BUG=101484
TEST=Open the avatar bubble and hit Cmd+Q. No crash.


Review URL: http://codereview.chromium.org/8351038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108138 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/browser/avatar_button_controller.mm

@@ -132,6 +132,14 @@ const CGFloat kMenuYOffsetAdjust = 1.0;
   return self;
 }
 
+- (void)dealloc {
+  [[NSNotificationCenter defaultCenter]
+      removeObserver:self
+                name:NSWindowWillCloseNotification
+              object:[menuController_ window]];
+  [super dealloc];
+}
+
 - (NSButton*)buttonView {
   return static_cast<NSButton*>(self.view);
 }

chrome/browser/ui/cocoa/hung_renderer_controller_unittest.mm

@@ -22,7 +22,7 @@ class HungRendererControllerTest : public CocoaTest {
   HungRendererController* hung_renderer_controller_;  // owned by its window
 };
 
-TEST_F(HungRendererControllerTest, FLAKY_TestShowAndClose) {
+TEST_F(HungRendererControllerTest, TestShowAndClose) {
   // Doesn't test much functionality-wise, but makes sure we can
   // display and tear down a window.
   [hung_renderer_controller_ showWindow:nil];