Revert 217768 "Adding key press detection in the browser process."

trunk/src/media/base/user_input_monitor.cc

-// Copyright 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 "media/base/user_input_monitor.h"
-
-#include "third_party/skia/include/core/SkPoint.h"
-
-namespace media {
-
-#ifdef DISABLE_USER_INPUT_MONITOR
-scoped_ptr<UserInputMonitor> UserInputMonitor::Create(
-    const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
-    const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner) {
-  return scoped_ptr<UserInputMonitor>();
-}
-#endif  // DISABLE_USER_INPUT_MONITOR
-
-UserInputMonitor::~UserInputMonitor() {
-  DCHECK(!monitoring_mouse_);
-  DCHECK(!monitoring_keyboard_);
-}
-
-void UserInputMonitor::AddMouseListener(MouseEventListener* listener) {
-  base::AutoLock auto_lock(lock_);
-  mouse_listeners_.AddObserver(listener);
-  if (!monitoring_mouse_) {
-    StartMouseMonitoring();
-    monitoring_mouse_ = true;
-    DVLOG(2) << "Started mouse monitoring.";
-  }
-}
-void UserInputMonitor::RemoveMouseListener(MouseEventListener* listener) {
-  base::AutoLock auto_lock(lock_);
-  mouse_listeners_.RemoveObserver(listener);
-  if (mouse_listeners_.size() == 0) {
-    StopMouseMonitoring();
-    monitoring_mouse_ = false;
-    DVLOG(2) << "Stopped mouse monitoring.";
-  }
-}
-void UserInputMonitor::AddKeyStrokeListener(KeyStrokeListener* listener) {
-  base::AutoLock auto_lock(lock_);
-  key_stroke_listeners_.AddObserver(listener);
-  if (!monitoring_keyboard_) {
-    StartKeyboardMonitoring();
-    monitoring_keyboard_ = true;
-    DVLOG(2) << "Started keyboard monitoring.";
-  }
-}
-void UserInputMonitor::RemoveKeyStrokeListener(KeyStrokeListener* listener) {
-  base::AutoLock auto_lock(lock_);
-  key_stroke_listeners_.RemoveObserver(listener);
-  if (key_stroke_listeners_.size() == 0) {
-    StopKeyboardMonitoring();
-    monitoring_keyboard_ = false;
-    DVLOG(2) << "Stopped keyboard monitoring.";
-  }
-}
-
-UserInputMonitor::UserInputMonitor()
-    : monitoring_mouse_(false), monitoring_keyboard_(false) {}
-
-void UserInputMonitor::OnMouseEvent(const SkIPoint& position) {
-  base::AutoLock auto_lock(lock_);
-  FOR_EACH_OBSERVER(
-      MouseEventListener, mouse_listeners_, OnMouseMoved(position));
-}
-
-void UserInputMonitor::OnKeyboardEvent(ui::EventType event,
-                                       ui::KeyboardCode key_code) {
-  base::AutoLock auto_lock(lock_);
-  // Updates the pressed keys and maybe notifies the key_stroke_listeners_.
-  if (event == ui::ET_KEY_PRESSED) {
-    if (pressed_keys_.find(key_code) != pressed_keys_.end())
-      return;
-    pressed_keys_.insert(key_code);
-    DVLOG(6) << "Key stroke detected.";
-    FOR_EACH_OBSERVER(KeyStrokeListener, key_stroke_listeners_, OnKeyStroke());
-  } else {
-    DCHECK_EQ(ui::ET_KEY_RELEASED, event);
-    DCHECK(pressed_keys_.find(key_code) != pressed_keys_.end());
-    pressed_keys_.erase(key_code);
-  }
-}
-
-}  // namespace media