Add out of memory stats for graphics memory, discards per minute

chrome/browser/chromeos/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 "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/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/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 "googleurl/src/gurl.h"
 
 using content::OpenURLParams;
 
 namespace {
 
 typedef InProcessBrowserTest OomPriorityManagerTest;
 
 IN_PROC_BROWSER_TEST_F(OomPriorityManagerTest, OomPriorityManagerBasics) {
   using content::WindowedNotificationObserver;
 
+  chromeos::OomPriorityManager* oom_priority_manager =
+      g_browser_process->oom_priority_manager();
+  EXPECT_FALSE(oom_priority_manager->recent_tab_discard());
+
   // Get three tabs open.
   WindowedNotificationObserver load1(
       content::NOTIFICATION_NAV_ENTRY_COMMITTED,
       content::NotificationService::AllSources());
   OpenURLParams open1(GURL(chrome::kChromeUIAboutURL), content::Referrer(),
                       CURRENT_TAB, content::PAGE_TRANSITION_TYPED, false);
   browser()->OpenURL(open1);
   load1.Wait();
 
   WindowedNotificationObserver load2(
@@ skipping 39 matching lines @@
 
   EXPECT_EQ(3, browser()->tab_strip_model()->count());
 
   // Discard a tab.  It should kill the first tab, since it was the oldest
   // and was not selected.
   EXPECT_TRUE(g_browser_process->oom_priority_manager()->DiscardTab());
   EXPECT_EQ(3, browser()->tab_strip_model()->count());
   EXPECT_TRUE(browser()->tab_strip_model()->IsTabDiscarded(0));
   EXPECT_FALSE(browser()->tab_strip_model()->IsTabDiscarded(1));
   EXPECT_FALSE(browser()->tab_strip_model()->IsTabDiscarded(2));
+  EXPECT_TRUE(oom_priority_manager->recent_tab_discard());
 
   // Run discard again, make sure it kills the second tab.
   EXPECT_TRUE(g_browser_process->oom_priority_manager()->DiscardTab());
   EXPECT_EQ(3, browser()->tab_strip_model()->count());
   EXPECT_TRUE(browser()->tab_strip_model()->IsTabDiscarded(0));
   EXPECT_TRUE(browser()->tab_strip_model()->IsTabDiscarded(1));
   EXPECT_FALSE(browser()->tab_strip_model()->IsTabDiscarded(2));
 
   // Kill the third tab. It should not kill the last tab, since it is active
   // tab.
@@ skipping 51 matching lines @@
   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()));
 }
 
 }  // namespace