base: Remove the string logging from CHECK().

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

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/browser_action_test_util.h"
 
 #include <stddef.h>
 
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
@@ skipping 173 matching lines @@
   frame.size.width = width;
   [containerView setFrame:frame];
 }
 
 ToolbarActionsBar* BrowserActionTestUtil::GetToolbarActionsBar() {
   return [GetController(browser_, test_helper_.get()) toolbarActionsBar];
 }
 
 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));
 }
 
 // static
 gfx::Size BrowserActionTestUtil::GetMinPopupSize() {
   return gfx::Size(NSSizeToCGSize([ExtensionPopupController minPopupSize]));
 }
 
 // static
 gfx::Size BrowserActionTestUtil::GetMaxPopupSize() {
   return gfx::Size(NSSizeToCGSize([ExtensionPopupController maxPopupSize]));
 }
 
 BrowserActionTestUtil::BrowserActionTestUtil(Browser* browser,
                                              BrowserActionTestUtil* main_bar)
     : browser_(browser),
       test_helper_(new TestToolbarActionsBarHelperCocoa(
           browser_, GetController(browser_, main_bar->test_helper_.get()))) {
 }