Improve grammar in some comments.

chrome/browser/ui/cocoa/panels/panel_window_controller_cocoa.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 
 // A class acting as the Objective-C controller for the Panel window
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single titlebar and is managed/owned by Panel.
@@ skipping 15 matching lines @@
 @end
 
 @interface PanelWindowControllerCocoa : NSWindowController
                                             <NSWindowDelegate,
                                              NSAnimationDelegate> {
  @private
   IBOutlet PanelTitlebarViewCocoa* titlebar_view_;
   std::unique_ptr<PanelCocoa> windowShim_;
   base::scoped_nsobject<NSString> pendingWindowTitle_;
   NSViewAnimation* boundsAnimation_;  // Lifetime controlled manually, needs
-                                      // more then just |release| to terminate.
+                                      // more than just |release| to terminate.
   BOOL animateOnBoundsChange_;
   BOOL throbberShouldSpin_;
   BOOL playingMinimizeAnimation_;
   float animationStopToShowTitlebarOnly_;
   BOOL canBecomeKeyWindow_;
   // Allow a panel to become key if activated via Panel logic, as opposed
   // to by default system selection. The system will prefer a panel
   // window over other application windows due to panels having a higher
   // priority NSWindowLevel, so we distinguish between the two scenarios.
   BOOL activationRequestedByPanel_;
@@ skipping 112 matching lines @@
 // Returns true if the user-resizing is allowed for the edge/corner close to
 // current mouse location.
 - (BOOL)canResizeByMouseAtCurrentLocation;
 
 - (NSRect)frameRectForContentRect:(NSRect)contentRect;
 - (NSRect)contentRectForFrameRect:(NSRect)frameRect;
 
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_