base: Remove the string logging from CHECK().

ui/base/ime/input_method_factory.cc

 // Copyright (c) 2012 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 "ui/base/ime/input_method_factory.h"
 
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "ui/base/ime/mock_input_method.h"
 
@@ skipping 50 matching lines @@
   return base::MakeUnique<InputMethodAndroid>(delegate);
 #else
   return base::MakeUnique<InputMethodMinimal>(delegate);
 #endif
 }
 
 void SetUpInputMethodFactoryForTesting() {
   if (g_input_method_set_for_testing)
     return;
 
-  CHECK(!g_create_input_method_called)
-      << "ui::SetUpInputMethodFactoryForTesting was called after use of "
-      << "ui::CreateInputMethod.  You must call "
-      << "ui::SetUpInputMethodFactoryForTesting earlier.";
+  // ui::SetUpInputMethodFactoryForTesting was called after use of
+  // ui::CreateInputMethod.  You must call ui::SetUpInputMethodFactoryForTesting
+  // earlier.
+  CHECK(!g_create_input_method_called);
 
   g_input_method_set_for_testing = true;
 }
 
 void SetUpInputMethodForTesting(InputMethod* input_method) {
   g_input_method_for_testing = input_method;
 }
 
 }  // namespace ui