Move the keyboard files from base/ to app/.

app/keyboard_code_conversion_mac.mm

 // Copyright (c) 2010 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.
 
-#import "base/keyboard_code_conversion_mac.h"
+#import "app/keyboard_code_conversion_mac.h"
 
 #include <algorithm>
 #import <Carbon/Carbon.h>
 
-#include "base/logging.h"
+#include "app/logging.h"
 
-namespace base {
+namespace app {
 
 namespace {
 
 // A struct to hold a Windows keycode to Mac virtual keycode mapping.
 struct KeyCodeMap {
   KeyboardCode keycode;
   int macKeycode;
   unichar characterIgnoringModifiers;
 };
 
@@ skipping 260 matching lines @@
     else if (macKeycode == kVK_ANSI_Backslash)
       *character = 28;
     else if (macKeycode == kVK_ANSI_RightBracket)
       *character = 29;
   }
 
   // TODO(suzhe): Support characters for Option key bindings.
   return macKeycode;
 }
 
-}  // namespace base
+}  // namespace app