base: Remove the string logging from CHECK().

chrome/browser/ui/cocoa/extensions/browser_action_test_util_mac.mm

Index: chrome/browser/ui/cocoa/extensions/browser_action_test_util_mac.mm
diff --git a/chrome/browser/ui/cocoa/extensions/browser_action_test_util_mac.mm b/chrome/browser/ui/cocoa/extensions/browser_action_test_util_mac.mm
index b0e3c7d74b967eb7155f9d997b2c1b49238b4b32..f24f17cf12c60da6f805472cf182858c537fe018 100644
--- a/chrome/browser/ui/cocoa/extensions/browser_action_test_util_mac.mm
+++ b/chrome/browser/ui/cocoa/extensions/browser_action_test_util_mac.mm
@@ -191,8 +191,8 @@ ToolbarActionsBar* BrowserActionTestUtil::GetToolbarActionsBar() {
 
 std::unique_ptr<BrowserActionTestUtil>
 BrowserActionTestUtil::CreateOverflowBar() {
-  CHECK(!GetToolbarActionsBar()->in_overflow_mode())
-      << "Only a main bar can create an overflow bar!";
+  // Only a main bar can create an overflow bar!
+  CHECK(!GetToolbarActionsBar()->in_overflow_mode());
   return base::WrapUnique(new BrowserActionTestUtil(browser_, this));
 }