Move chrome/browser/plugin_* to chrome/browser/plugins/

chrome/browser/plugins/plugin_installer_observer.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 "chrome/browser/plugin_installer_observer.h"
+#include "chrome/browser/plugins/plugin_installer_observer.h"
 
-#include "chrome/browser/plugin_installer.h"
+#include "chrome/browser/plugins/plugin_installer.h"
 
 PluginInstallerObserver::PluginInstallerObserver(PluginInstaller* installer)
     : installer_(installer) {
   installer->AddObserver(this);
 }
 
 PluginInstallerObserver::~PluginInstallerObserver() {
   installer_->RemoveObserver(this);
 }
 
@@ skipping 13 matching lines @@
     PluginInstaller* installer) : PluginInstallerObserver(installer) {
   installer->AddWeakObserver(this);
 }
 
 WeakPluginInstallerObserver::~WeakPluginInstallerObserver() {
   installer()->RemoveWeakObserver(this);
 }
 
 void WeakPluginInstallerObserver::OnlyWeakObserversLeft() {
 }