Handle Esc key press event in Local NTP.

chrome/common/render_messages.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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 305 matching lines @@
 
 IPC_MESSAGE_ROUTED0(ChromeViewMsg_DetermineIfPageSupportsInstant)
 
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SearchBoxAutocompleteResults,
                     std::vector<InstantAutocompleteResult>
                         /* native_suggestions */)
 
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SearchBoxUpOrDownKeyPressed,
                     int /* count */)
 
+IPC_MESSAGE_ROUTED0(ChromeViewMsg_SearchBoxEscKeyPressed)
+
 IPC_MESSAGE_ROUTED4(ChromeViewMsg_SearchBoxCancelSelection,
                     string16 /* value */,
                     bool /* verbatim */,
                     size_t /* selection_start */,
                     size_t /* selection_end */)
 
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SearchBoxModeChanged,
                     SearchMode /* mode */)
 
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SearchBoxSetDisplayInstantResults,
@@ skipping 399 matching lines @@
 // previous SetCookie message to be processed.
 IPC_SYNC_MESSAGE_ROUTED2_1(ChromeViewHostMsg_GetCookies,
                            GURL /* url */,
                            GURL /* first_party_for_cookies */,
                            std::string /* cookies */)
 
 // Provide the browser process with current renderer framerate.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)