Disable TabposeWindowTest.TestModelObserver on 10.7. It crashes flakily.

chrome/browser/ui/cocoa/tabpose_window_unittest.mm

Index: chrome/browser/ui/cocoa/tabpose_window_unittest.mm
diff --git a/chrome/browser/ui/cocoa/tabpose_window_unittest.mm b/chrome/browser/ui/cocoa/tabpose_window_unittest.mm
index 4013bae3483936b727a40a87211485c062af7063..e84d65e196178c9f772e6273def3268677ae92fb 100644
--- a/chrome/browser/ui/cocoa/tabpose_window_unittest.mm
+++ b/chrome/browser/ui/cocoa/tabpose_window_unittest.mm
@@ -63,6 +63,12 @@ TEST_F(TabposeWindowTest, TestShow) {
 }
 
 TEST_F(TabposeWindowTest, TestModelObserver) {
+  // Skip this test on 10.7
+  // http://code.google.com/p/chromium/issues/detail?id=127845
+  if (base::mac::IsOSLionOrLater()) {
+    return;
+  }
+
   NSWindow* parent = browser()->window()->GetNativeWindow();
   [parent orderFront:nil];