arc: Fix few typos in comments

Bug: none
Change-Id: Iba0bacce5bd0baf9079bab9a8ce0e2bb4f884fca
Reviewed-on: https://chromium-review.googlesource.com/565405Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485926}

chrome/browser/chromeos/arc/arc_migration_guide_notification.cc

@@ -128,14 +128,14 @@ void ShowArcMigrationSuccessNotificationIfNeeded(Profile* profile) {
 
     // Log a warning message because, for now, this should not basically happen
     // except for some exceptional situation or due to some bug.
-    LOG(WARNING) << "Migration has happend for an ARC-disallowed user.";
+    LOG(WARNING) << "Migration has happened for an ARC-disallowed user.";
   } else {
     message_center::NotifierId notifier_id(
         message_center::NotifierId::SYSTEM_COMPONENT, kNotifierId);
     notifier_id.profile_id = account_id.GetUserEmail();
 
     // Delay the notification to make sure that it is not hidden behind windows
-    // which are shown at the beginnig of user session (e.g. Chrome).
+    // which are shown at the beginning of user session (e.g. Chrome).
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE,
         base::BindOnce(&DoShowArcMigrationSuccessNotification, notifier_id),

chrome/browser/chromeos/arc/arc_migration_guide_notification.h

@@ -10,12 +10,12 @@ class Profile;
 namespace arc {
 
 // Shows a notification for guiding the user for file system migration.
-// This is used when an ARC app is launched while ARC is temporaliry disabled
+// This is used when an ARC app is launched while ARC is temporarily disabled
 // due to the file system incompatibility.
 void ShowArcMigrationGuideNotification(Profile* profile);
 
 // Shows a one-time notification when this is the first sign-in after the
-// migration has happend successfully. It records the fact to the pref that no
+// migration has happened successfully. It records the fact to the pref that no
 // more notification is necessary, either when it showed the notification or
 // when the profile is newly created on the compatible filesystem.
 void ShowArcMigrationSuccessNotificationIfNeeded(Profile* profile);

chrome/browser/chromeos/arc/arc_util.h

@@ -27,11 +27,11 @@ namespace arc {
 // Values to be stored in the local state preference to keep track of the
 // filesystem encryption migration status.
 enum FileSystemCompatibilityState : int32_t {
-  // No migiration has happend, user keeps using the old file system.
+  // No migration has happened, user keeps using the old file system.
   kFileSystemIncompatible = 0,
-  // Migration has happend. New filesystem is in use.
+  // Migration has happened. New filesystem is in use.
   kFileSystemCompatible = 1,
-  // Migration has happend, and a notification about the fact was already shown.
+  // Migration has happened, and a notification about it was already shown.
   kFileSystemCompatibleAndNotified = 2,
 
   // Existing code assumes that kFileSystemIncompatible is the only state
@@ -47,7 +47,7 @@ enum FileSystemCompatibilityState : int32_t {
 bool IsArcAllowedForProfile(const Profile* profile);
 
 // Returns true if the profile is temporarily blocked to run ARC in the current
-// session, because the filesystem storing the profile is incomaptible with the
+// session, because the filesystem storing the profile is incompatible with the
 // currently installed ARC version.
 //
 // The actual filesystem check is performed only when it is running on the