base: Remove the string logging from CHECK().

extensions/browser/app_window/app_window.cc

 // Copyright 2014 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 "extensions/browser/app_window/app_window.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 234 matching lines @@
       app_delegate_(app_delegate),
       fullscreen_types_(FULLSCREEN_TYPE_NONE),
       has_been_shown_(false),
       is_hidden_(false),
       cached_always_on_top_(false),
       requested_alpha_enabled_(false),
       is_ime_window_(false),
       show_in_shelf_(false),
       image_loader_ptr_factory_(this) {
   ExtensionsBrowserClient* client = ExtensionsBrowserClient::Get();
-  CHECK(!client->IsGuestSession(context) || context->IsOffTheRecord())
-      << "Only off the record window may be opened in the guest mode.";
+  // Only off the record window may be opened in the guest mode.
+  CHECK(!client->IsGuestSession(context) || context->IsOffTheRecord());
 }
 
 void AppWindow::Init(const GURL& url,
                      AppWindowContents* app_window_contents,
                      content::RenderFrameHost* creator_frame,
                      const CreateParams& params) {
   // Initialize the render interface and web contents
   app_window_contents_.reset(app_window_contents);
   app_window_contents_->Initialize(browser_context(), creator_frame, url);
 
@@ skipping 846 matching lines @@
         region.bounds.x(),
         region.bounds.y(),
         region.bounds.right(),
         region.bounds.bottom(),
         region.draggable ? SkRegion::kUnion_Op : SkRegion::kDifference_Op);
   }
   return sk_region;
 }
 
 }  // namespace extensions