Remove keyboard usability mode

ui/keyboard/keyboard_controller.cc

 // Copyright (c) 2013 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/keyboard/keyboard_controller.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_iterator.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/keyboard/keyboard_controller_proxy.h"
 #include "ui/keyboard/keyboard_layout_manager.h"
-#include "ui/keyboard/keyboard_switches.h"
 #include "ui/keyboard/keyboard_util.h"
 #include "ui/wm/core/masked_window_targeter.h"
 
 #if defined(OS_CHROMEOS)
 #include "base/process/launch.h"
 #include "base/sys_info.h"
 #endif
 
 namespace {
 
@@ skipping 361 matching lines @@
     show_on_resize_ = false;
     proxy_->ReloadKeyboardIfNeeded();
   }
 }
 
 void KeyboardController::OnTextInputStateChanged(
     const ui::TextInputClient* client) {
   if (!container_.get())
     return;
 
-  if (IsKeyboardUsabilityExperimentEnabled()) {
-    ShowKeyboardInternal();
-    return;
-  }
-
   type_ = client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE;
 
   if (type_ == ui::TEXT_INPUT_TYPE_NONE && !lock_keyboard_) {
     if (keyboard_visible_) {
       // Set the visibility state here so that any queries for visibility
       // before the timer fires returns the correct future value.
       keyboard_visible_ = false;
       base::MessageLoop::current()->PostDelayedTask(
           FROM_HERE,
           base::Bind(&KeyboardController::HideKeyboard,
@@ skipping 153 matching lines @@
   proxy_->HideKeyboardContainer(container_.get());
 }
 
 void KeyboardController::AddBoundsChangedObserver(aura::Window* window) {
   aura::Window* target_window = GetFrameWindow(window);
   if (target_window)
     window_bounds_observer_->AddObservedWindow(target_window);
 }
 
 }  // namespace keyboard