Enable TabManager on Linux

chrome/browser/memory/tab_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/base_switches.h"
 #include "base/command_line.h"
 #include "base/memory/memory_pressure_listener.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 10 matching lines @@
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/interactive_test_utils.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/test_utils.h"
 #include "url/gurl.h"
 
 using content::OpenURLParams;
 
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
 
 namespace memory {
 
 class TabManagerTest : public InProcessBrowserTest {
  public:
   // Tab discarding is enabled by default on CrOS. On other platforms, force it
   // by turning on the corresponding experiment as some tests assume this
   // behavior it turned on.
   void SetUpCommandLine(base::CommandLine* command_line) override {
-#if !defined(OS_CHROMEOS)
+#if !defined(OS_LINUX)
     command_line->AppendSwitchASCII(switches::kEnableFeatures,
                                     features::kAutomaticTabDiscarding.name);
 #endif
   }
 };
 
 IN_PROC_BROWSER_TEST_F(TabManagerTest, TabManagerBasics) {
   using content::WindowedNotificationObserver;
   TabManager* tab_manager = g_browser_process->GetTabManager();
   ASSERT_TRUE(tab_manager);
@@ skipping 122 matching lines @@
   EXPECT_TRUE(chrome::CanGoForward(browser()));
   WindowedNotificationObserver back2(
       content::NOTIFICATION_NAV_ENTRY_COMMITTED,
       content::NotificationService::AllSources());
   chrome::GoBack(browser(), CURRENT_TAB);
   back2.Wait();
   EXPECT_FALSE(chrome::CanGoBack(browser()));
   EXPECT_TRUE(chrome::CanGoForward(browser()));
 }
 
+// On Linux, memory pressure listener is not implemented yet.
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
+
 // Test that the MemoryPressureListener event is properly triggering a tab
 // discard upon |MEMORY_PRESSURE_LEVEL_CRITICAL| event.
 IN_PROC_BROWSER_TEST_F(TabManagerTest, OomPressureListener) {
   TabManager* tab_manager = g_browser_process->GetTabManager();
   ASSERT_TRUE(tab_manager);
 
   // Disable the protection of recent tabs.
   tab_manager->minimum_protection_time_ = base::TimeDelta::FromMinutes(0);
 
   // Get three tabs open.
@@ skipping 30 matching lines @@
   while (--timeout) {
     base::PlatformThread::Sleep(
         base::TimeDelta::FromMilliseconds(kIntervalTimeInMS));
     base::RunLoop().RunUntilIdle();
     if (tab_manager->recent_tab_discard())
       break;
   }
   EXPECT_TRUE(tab_manager->recent_tab_discard());
 }
 
+#endif
+
 IN_PROC_BROWSER_TEST_F(TabManagerTest, InvalidOrEmptyURL) {
   TabManager* tab_manager = g_browser_process->GetTabManager();
   ASSERT_TRUE(tab_manager);
 
   // Disable the protection of recent tabs.
   tab_manager->minimum_protection_time_ = base::TimeDelta::FromMinutes(0);
 
   // Open two tabs. Wait for the foreground one to load but do not wait for the
   // background one.
   content::WindowedNotificationObserver load1(
@@ skipping 140 matching lines @@
   // Remove the video stream.
   video_stream_ui.reset();
 
   // Should be able to discard the background tab now.
   EXPECT_TRUE(tab_manager->DiscardTabImpl());
 }
 
 }  // namespace memory
 
 #endif  // OS_WIN || OS_CHROMEOS