Remove the 2-level input method system & InputMethodBridge.

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 "ui/base/ime/mock_input_method.h"
 
 #if defined(OS_CHROMEOS)
 #include "ui/base/ime/input_method_chromeos.h"
 #elif defined(OS_WIN)
 #include "base/win/metro.h"
 #include "ui/base/ime/input_method_win.h"
 #include "ui/base/ime/remote_input_method_win.h"
 #elif defined(OS_MACOSX)
 #include "ui/base/ime/input_method_mac.h"
 #elif defined(USE_AURA) && defined(OS_LINUX) && defined(USE_X11) && \
       !defined(OS_CHROMEOS)
 #include "ui/base/ime/input_method_auralinux.h"
 #else
 #include "ui/base/ime/input_method_minimal.h"
 #endif
 
 namespace {
 
+ui::InputMethod* g_input_method_for_testing = nullptr;
+
 bool g_input_method_set_for_testing = false;
 
 bool g_create_input_method_called = false;
 
 }  // namespace
 
 namespace ui {
 
 scoped_ptr<InputMethod> CreateInputMethod(
     internal::InputMethodDelegate* delegate,
     gfx::AcceleratedWidget widget) {
   if (!g_create_input_method_called)
     g_create_input_method_called = true;
 
+  if (g_input_method_for_testing)
+    return make_scoped_ptr(g_input_method_for_testing);

[James Su, 2015/06/12 07:58:50]

Not sure if this code is correct. If more than one caller call this method, will
g_input_method_for_testing be deleted for multiple times?

[Shu Chen, 2015/06/12 08:51:31]

Done. Doing "g_input_method_for_testing = nullptr;" before returning should be
enough to avoid the problem of multiple calls, although there is no multi-calls
in all existing tests.

+
   if (g_input_method_set_for_testing)
     return make_scoped_ptr(new MockInputMethod(delegate));
 
 #if defined(OS_CHROMEOS)
   return make_scoped_ptr(new InputMethodChromeOS(delegate));
 #elif defined(OS_WIN)
   if (IsRemoteInputMethodWinRequired(widget))
     return CreateRemoteInputMethodWin(delegate);
   return make_scoped_ptr(new InputMethodWin(delegate, widget));
 #elif defined(OS_MACOSX)
@@ skipping 11 matching lines @@
     return;
 
   CHECK(!g_create_input_method_called)
       << "ui::SetUpInputMethodFactoryForTesting was called after use of "
       << "ui::CreateInputMethod.  You must call "
       << "ui::SetUpInputMethodFactoryForTesting earlier.";
 
   g_input_method_set_for_testing = true;
 }
 
+void SetUpInputMethodForTesting(InputMethod* input_method) {
+  g_input_method_for_testing = input_method;
+}
+
 }  // namespace ui