Add "Keep chrome running in background" preference.

chrome/browser/background_mode_manager_unittest.cc

Index: chrome/browser/background_mode_manager_unittest.cc
diff --git a/chrome/browser/background_mode_manager_unittest.cc b/chrome/browser/background_mode_manager_unittest.cc
index abfbf904791a1c1f24a82ae2cbe87158aad4a0f0..dc19e2aeda3720bc87aab13bc93431b85d71811b 100644
--- a/chrome/browser/background_mode_manager_unittest.cc
+++ b/chrome/browser/background_mode_manager_unittest.cc
@@ -13,7 +13,9 @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using testing::AtLeast;
 using testing::InSequence;
+using testing::Return;
 
 class BackgroundModeManagerTest : public TestingBrowserProcessTest {
  public:
@@ -28,11 +30,15 @@ class BackgroundModeManagerTest : public TestingBrowserProcessTest {
 class TestBackgroundModeManager : public BackgroundModeManager {
  public:
   TestBackgroundModeManager(Profile* profile, CommandLine* cl)
-      : BackgroundModeManager(profile, cl) {
-  }
+      : BackgroundModeManager(profile, cl),
+        enabled_(true) {}
   MOCK_METHOD1(EnableLaunchOnStartup, void(bool));
   MOCK_METHOD0(CreateStatusTrayIcon, void());
   MOCK_METHOD0(RemoveStatusTrayIcon, void());
+  virtual bool IsBackgroundModePrefEnabled() { return enabled_; }
+  void SetEnabled(bool enabled) { enabled_ = enabled; }
+ private:
+  bool enabled_;
 };
 
 TEST_F(BackgroundModeManagerTest, BackgroundAppLoadUnload) {
@@ -65,3 +71,57 @@ TEST_F(BackgroundModeManagerTest, BackgroundAppInstallUninstall) {
   manager.OnBackgroundAppUnloaded();
   manager.OnBackgroundAppUninstalled();
 }
+
+// App installs while disabled should do nothing.
+TEST_F(BackgroundModeManagerTest, BackgroundAppInstallUninstallWhileDisabled) {
+  InSequence s;
+  TestingProfile profile;
+  TestBackgroundModeManager manager(&profile, command_line_.get());
+  // Turn off background mode.
+  manager.SetEnabled(false);
+  manager.DisableBackgroundMode();
+
+  // Status tray icons will not be created, launch on startup status will be set
+  // to "do not launch on startup".
+  EXPECT_CALL(manager, EnableLaunchOnStartup(false));
+  manager.OnBackgroundAppInstalled(NULL);
+  manager.OnBackgroundAppLoaded();
+  manager.OnBackgroundAppUnloaded();
+  manager.OnBackgroundAppUninstalled();
+
+  // Re-enable background mode.
+  manager.SetEnabled(true);
+  manager.EnableBackgroundMode();
+}
+
+
+// App installs while disabled should do nothing.
+TEST_F(BackgroundModeManagerTest, EnableAfterBackgroundAppInstall) {
+  InSequence s;
+  TestingProfile profile;
+  TestBackgroundModeManager manager(&profile, command_line_.get());
+  EXPECT_CALL(manager, EnableLaunchOnStartup(true));
+  EXPECT_CALL(manager, CreateStatusTrayIcon());
+  EXPECT_CALL(manager, RemoveStatusTrayIcon());
+  EXPECT_CALL(manager, EnableLaunchOnStartup(false));
+  EXPECT_CALL(manager, CreateStatusTrayIcon());
+  EXPECT_CALL(manager, EnableLaunchOnStartup(true));
+  EXPECT_CALL(manager, RemoveStatusTrayIcon());
+  EXPECT_CALL(manager, EnableLaunchOnStartup(false));
+
+  // Install app, should show status tray icon.
+  manager.OnBackgroundAppInstalled(NULL);
+  manager.OnBackgroundAppLoaded();
+
+  // Turn off background mode - should hide status tray icon.
+  manager.SetEnabled(false);
+  manager.DisableBackgroundMode();
+
+  // Turn back on background mode - should show status tray icon.
+  manager.SetEnabled(true);
+  manager.EnableBackgroundMode();
+
+  // Uninstall app, should hide status tray icon again.
+  manager.OnBackgroundAppUnloaded();
+  manager.OnBackgroundAppUninstalled();
+}