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

chrome/browser/memory/oom_priority_manager_browsertest.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 "base/command_line.h"
 #include "base/memory/memory_pressure_listener.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/memory/oom_priority_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/test/test_utils.h"
 #include "url/gurl.h"
 
 using content::OpenURLParams;
 
-#if defined(OS_WIN) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_CHROMEOS) || defined(OS_LINUX)
 
 namespace memory {
 namespace {
 
 class OomPriorityManagerTest : public InProcessBrowserTest {
  public:
   // Tab discarding is enabled by default on CrOS, on other platforms, force it
   // by setting the command line flag.
   void SetUpCommandLine(base::CommandLine* command_line) override {
 #if !defined(OS_CHROMEOS)
@@ skipping 181 matching lines @@
     if (oom_priority_manager->recent_tab_discard())
       break;
   }
   EXPECT_TRUE(oom_priority_manager->recent_tab_discard());
 }
 
 }  // namespace
 }  // namespace memory
 
 #endif  // OS_WIN || OS_CHROMEOS