Make unit_tests runnable on Lion without crashing. Now tests just fail.

chrome/browser/ui/cocoa/hover_image_button_unittest.mm

Index: chrome/browser/ui/cocoa/hover_image_button_unittest.mm
diff --git a/chrome/browser/ui/cocoa/hover_image_button_unittest.mm b/chrome/browser/ui/cocoa/hover_image_button_unittest.mm
index 00c18b8100bba5f0477de302f175350a978ce4ed..6b8ab0ed50355c84f06aced1c9cca42abb86b6b2 100644
--- a/chrome/browser/ui/cocoa/hover_image_button_unittest.mm
+++ b/chrome/browser/ui/cocoa/hover_image_button_unittest.mm
@@ -4,6 +4,7 @@
 
 #import <Cocoa/Cocoa.h>
 
+#include "base/mac/mac_util.h"
 #include "base/memory/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/hover_image_button.h"
@@ -28,6 +29,11 @@ class HoverImageButtonTest : public CocoaTest {
 
   virtual void SetUp() {
     CocoaTest::BootstrapCocoa();
+
+    // This test crashes when run on Lion. Fail early.
+    if (base::mac::IsOSLionOrLater()) {
+      FAIL() << "This test crashes on Lion; http://crbug.com/93926";
+    }
   }
 
   HoverImageButton* button_;