Fix some typos.

base/mac/mac_util.mm

 // Copyright (c) 2011 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/mac/mac_util.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/sys_string_conversions.h"
 
 namespace base {
 namespace mac {
 
 namespace {
 
-// a count of currently outstanding requests for full screen mode from browser
+// A count of currently outstanding requests for full screen mode from browser
 // windows, plugins, etc.
 int g_full_screen_requests[kNumFullScreenModes] = { 0, 0, 0};
 
 // Sets the appropriate SystemUIMode based on the current full screen requests.
 // Since only one SystemUIMode can be active at a given time, full screen
 // requests are ordered by priority.  If there are no outstanding full screen
 // requests, reverts to normal mode.  If the correct SystemUIMode is already
 // set, does nothing.
 void SetUIMode() {
   // Get the current UI mode.
@@ skipping 37 matching lines @@
                      kProcessDictionaryIncludeAllInformationMask)));
 
   // Check that creator process code is that of loginwindow.
   BOOL result =
       [[parent_info objectForKey:@"FileCreator"] isEqualToString:@"lgnw"];
 
   return result == YES;
 }
 
 // Looks into Shared File Lists corresponding to Login Items for the item
-// representing the current application. If such an item is found, returns
+// representing the current application. If such an item is found, returns a
 // retained reference to it. Caller is responsible for releasing the reference.
 LSSharedFileListItemRef GetLoginItemForApp() {
   ScopedCFTypeRef<LSSharedFileListRef> login_items(LSSharedFileListCreate(
       NULL, kLSSharedFileListSessionLoginItems, NULL));
 
   if (!login_items.get()) {
     LOG(ERROR) << "Couldn't get a Login Items list.";
     return NULL;
   }
 
@@ skipping 180 matching lines @@
 
   NSURL* url = [NSURL fileURLWithPath:filePath];
   // Note that we always set CSBackupSetItemExcluded's excludeByPath param
   // to true.  This prevents a problem with toggling the setting: if the file
   // is excluded with excludeByPath set to true then excludeByPath must
   // also be true when un-excluding the file, otherwise the un-excluding
   // will be ignored.
   bool success =
       CSBackupSetItemExcluded((CFURLRef)url, exclude, true) == noErr;
   if (!success)
-    LOG(WARNING) << "Failed to set backup excluson for file '"
+    LOG(WARNING) << "Failed to set backup exclusion for file '"
                  << file_path.value().c_str() << "'.  Continuing.";
   return success;
 }
 
 void SetProcessName(CFStringRef process_name) {
   if (!process_name || CFStringGetLength(process_name) == 0) {
     NOTREACHED() << "SetProcessName given bad name.";
     return;
   }
 
@@ skipping 257 matching lines @@
         CFDictionaryGetValue(user_info.get(), kCFErrorDescriptionKey));
   }
   o << "Code: " << CFErrorGetCode(err)
     << " Domain: " << CFErrorGetDomain(err)
     << " Desc: " << desc.get();
   if(errorDesc) {
     o << "(" << errorDesc << ")";
   }
   return o;
 }