Removes mouse listeners from UserInputMonitor.

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 "base/logging.h"
 
 namespace media {
 
 #ifdef DISABLE_USER_INPUT_MONITOR
 std::unique_ptr<UserInputMonitor> UserInputMonitor::Create(
     const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
     const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner) {
   return nullptr;
 }
 #endif  // DISABLE_USER_INPUT_MONITOR
 
-UserInputMonitor::UserInputMonitor()
-    : key_press_counter_references_(0),
-      mouse_listeners_count_(0),
-      mouse_listeners_(new MouseListenerList()) {}
+UserInputMonitor::UserInputMonitor() : key_press_counter_references_(0) {}

[Wez, 2016/12/16 02:06:43]

nit: You could move this initialization into the header if you line, in-line in
the class.

[CJ, 2016/12/22 22:42:57]

Done.

 
 UserInputMonitor::~UserInputMonitor() {
   DCHECK_EQ(0u, key_press_counter_references_);
-  mouse_listeners_->AssertEmpty();
-}
-
-void UserInputMonitor::AddMouseListener(MouseEventListener* listener) {
-  mouse_listeners_->AddObserver(listener);
-  {
-    base::AutoLock auto_lock(lock_);
-    mouse_listeners_count_++;
-    if (mouse_listeners_count_ == 1) {
-      StartMouseMonitoring();
-      DVLOG(2) << "Started mouse monitoring.";
-    }
-  }
-}
-
-void UserInputMonitor::RemoveMouseListener(MouseEventListener* listener) {
-  mouse_listeners_->RemoveObserver(listener);
-  {
-    base::AutoLock auto_lock(lock_);
-    DCHECK_NE(mouse_listeners_count_, 0u);
-    mouse_listeners_count_--;
-    if (mouse_listeners_count_ == 0) {
-      StopMouseMonitoring();
-      DVLOG(2) << "Stopped mouse monitoring.";
-    }
-  }
 }
 
 void UserInputMonitor::EnableKeyPressMonitoring() {
   base::AutoLock auto_lock(lock_);
   ++key_press_counter_references_;
   if (key_press_counter_references_ == 1) {
     StartKeyboardMonitoring();
     DVLOG(2) << "Started keyboard monitoring.";
   }
 }
 
 void UserInputMonitor::DisableKeyPressMonitoring() {
   base::AutoLock auto_lock(lock_);
   DCHECK_NE(key_press_counter_references_, 0u);
   --key_press_counter_references_;
   if (key_press_counter_references_ == 0) {
     StopKeyboardMonitoring();
     DVLOG(2) << "Stopped keyboard monitoring.";
   }
 }
 
 }  // namespace media