Improve grammar in some comments.

chrome/browser/ui/panels/panel_constants.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_PANELS_PANEL_CONSTANTS_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_CONSTANTS_H_
 
 #include "build/build_config.h"
 
 namespace panel {
 
 // The height in pixels of the titlebar.
 static const int kTitlebarHeight = 36;
 
 // Absolute minimum width and height for panels, including non-client area.
 // Should only be big enough to accomodate a close button on the reasonably
 // recognisable titlebar.
 // These numbers are semi-arbitrary.
 // Motivation for 'width' is to make main buttons on the titlebar functional.
 // Motivation for height is to allow autosized tightly-wrapped panel with a
-// single line of text - so the height is set to be likely less then a titlebar,
+// single line of text - so the height is set to be likely less than a titlebar,
 // to make sure even small content is tightly wrapped.
 const int kPanelMinWidth = 80;
 const int kPanelMinHeight = kTitlebarHeight + 10;
 
 // The panel can be minimized to 4-pixel lines.
 static const int kMinimizedPanelHeight = 4;
 
 // The size (width or height) of the app icon (taskbar icon).
 static const int kPanelAppIconSize = 32;
 
@@ skipping 59 matching lines @@
 enum CornerStyle {
   NOT_ROUNDED = 0,
   TOP_ROUNDED = 0x1,
   BOTTOM_ROUNDED = 0x2,
   ALL_ROUNDED = TOP_ROUNDED | BOTTOM_ROUNDED
 };
 
 }  // namespace panel
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_CONSTANTS_H_