base: Remove the string logging from CHECK().

content/shell/browser/layout_test/layout_test_bluetooth_chooser_factory.cc

 // Copyright 2015 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 "content/shell/browser/layout_test/layout_test_bluetooth_chooser_factory.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/render_frame_host.h"
@@ skipping 69 matching lines @@
     std::string event = "remove-device(";
     event += device_id;
     event += ")";
     factory_->events_.push_back(event);
   }
 
   EventHandler event_handler;
 
  private:
   void CheckFactory() const {
-    CHECK(factory_) << "The factory should cancel all choosers in its "
-                       "destructor, and choosers should be destroyed "
-                       "synchronously when canceled.";
+    // The factory should cancel all choosers in its destructor, and choosers
+    // should be destroyed synchronously when canceled.
+    CHECK(factory_);
   }
 
   base::WeakPtr<LayoutTestBluetoothChooserFactory> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Chooser);
 };
 
 LayoutTestBluetoothChooserFactory::LayoutTestBluetoothChooserFactory()
     : weak_this_(this) {}
 
@@ skipping 26 matching lines @@
     const std::string& device_id) {
   // Copy |choosers_| to make sure event handler executions that modify
   // |choosers_| don't invalidate iterators.
   std::vector<Chooser*> choosers_copy(choosers_.begin(), choosers_.end());
   for (Chooser* chooser : choosers_copy) {
     chooser->event_handler.Run(event, device_id);
   }
 }
 
 }  // namespace content