Remove PeerConnectionIdentityStore and related messaging/storage code.

content/common/media/webrtc_identity_messages.h

-// Copyright 2013 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.
-
-// IPC messages for requesting WebRTC identity.
-// Multiply-included message file, hence no include guard.
-
-#include "content/common/content_export.h"
-#include "ipc/ipc_message_macros.h"
-#include "url/gurl.h"
-
-#define IPC_MESSAGE_START WebRTCIdentityMsgStart
-#undef IPC_MESSAGE_EXPORT
-#define IPC_MESSAGE_EXPORT CONTENT_EXPORT
-
-IPC_STRUCT_BEGIN(WebRTCIdentityMsg_RequestIdentity_Params)
-  IPC_STRUCT_MEMBER(int, request_id)
-  IPC_STRUCT_MEMBER(GURL, url)
-  IPC_STRUCT_MEMBER(GURL, first_party_for_cookies)
-  IPC_STRUCT_MEMBER(std::string, identity_name)
-  IPC_STRUCT_MEMBER(std::string, common_name)
-IPC_STRUCT_END()
-
-// Messages sent from the renderer to the browser.
-// Request a WebRTC identity.
-IPC_MESSAGE_CONTROL1(WebRTCIdentityMsg_RequestIdentity,
-                     WebRTCIdentityMsg_RequestIdentity_Params)
-
-// Cancel the WebRTC identity request.
-IPC_MESSAGE_CONTROL0(WebRTCIdentityMsg_CancelRequest)
-
-// Messages sent from the browser to the renderer.
-// Return a WebRTC identity.
-IPC_MESSAGE_CONTROL3(WebRTCIdentityHostMsg_IdentityReady,
-                     int /* request_id */,
-                     std::string /* certificate */,
-                     std::string /* private_key */)
-// Notifies an error from the identity request.
-IPC_MESSAGE_CONTROL2(WebRTCIdentityHostMsg_RequestFailed,
-                     int /* request_id */,
-                     int /* error */)