Add oom tab killing and the about:discards page on linux

chrome/browser/browser_process_impl.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/browser_process_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 129 matching lines @@
 #endif
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
 #include "chrome/browser/plugins/plugins_resource_service.h"
 #endif
 
 #if defined(ENABLE_WEBRTC)
 #include "chrome/browser/media/webrtc_log_uploader.h"
 #endif
 
-#if defined(OS_WIN) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_CHROMEOS) || defined(OS_LINUX)
 #include "chrome/browser/memory/oom_priority_manager.h"
 #endif
 
 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
 // How often to check if the persistent instance of Chrome needs to restart
 // to install an update.
 static const int kUpdateCheckIntervalHours = 6;
 #endif
 
 #if defined(USE_X11) || defined(OS_WIN) || defined(USE_OZONE)
@@ skipping 606 matching lines @@
 
 gcm::GCMDriver* BrowserProcessImpl::gcm_driver() {
   DCHECK(CalledOnValidThread());
   if (!gcm_driver_)
     CreateGCMDriver();
   return gcm_driver_.get();
 }
 
 memory::OomPriorityManager* BrowserProcessImpl::GetOomPriorityManager() {
   DCHECK(CalledOnValidThread());
-#if defined(OS_WIN) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_CHROMEOS) || defined(OS_LINUX)
   if (!oom_priority_manager_.get())
     oom_priority_manager_.reset(new memory::OomPriorityManager());
   return oom_priority_manager_.get();
 #else
   return nullptr;
 #endif
 }
 
 ShellIntegration::DefaultWebClientState
 BrowserProcessImpl::CachedDefaultWebClientState() {
@@ skipping 472 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)