Fixed full screen magnifier switching in oobe.

Before full screen magnifier was enabled by default, instead of disabled. Also, it didn't listen to state switches. This patch addresses these issues.

BUG=163147


Review URL: https://chromiumcodereview.appspot.com/11412264

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170956 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/accessibility/magnification_manager.cc

@@ -102,15 +102,8 @@ class MagnificationManagerImpl : public MagnificationManager,
   }
 
   void UpdateMagnifierStatus() {
-    UserManager* manager = UserManager::Get();
-    if (!profile_) {
-      SetMagnifier(ash::MAGNIFIER_OFF);
-    } else if (manager && !manager->IsSessionStarted()) {
-      SetMagnifier(ash::MAGNIFIER_FULL);
-    } else {
-      ash::MagnifierType type = GetMagnifierType();
-      SetMagnifier(type);
-    }
+    ash::MagnifierType type = GetMagnifierType();
+    SetMagnifier(type);
   }
 
   virtual void Observe(int type,

chrome/browser/chromeos/accessibility/magnification_manager_browsertest.cc

@@ -58,14 +58,14 @@ class MagnificationManagerTest : public CrosInProcessBrowserTest {
 };
 
 IN_PROC_BROWSER_TEST_F(MagnificationManagerTest, Login) {
-  // Confirms that magnifier is enabled on the login screen.
-  CheckCurrentMagnifierType(ash::MAGNIFIER_FULL);
+  // Confirms that magnifier is disabled on the login screen.
+  CheckCurrentMagnifierType(ash::MAGNIFIER_OFF);
 
   // Logs in.
   UserManager::Get()->UserLoggedIn("owner@invalid.domain", true);
   UserManager::Get()->SessionStarted();
 
-  // Confirms that magnifier is disabled just after login.
+  // Confirms that magnifier is still disabled just after login.
   CheckCurrentMagnifierType(ash::MAGNIFIER_OFF);
 
   // Enables magnifier.