Add a policy to re-enable deprecated web platform features.

content/common/view_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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/cookie_data.h"
+#include "content/common/date_time_suggestion.h"
 #include "content/common/input/did_overscroll_params.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "content/common/navigation_gesture.h"
 #include "content/common/pepper_renderer_instance_data.h"
 #include "content/common/view_message_enums.h"
 #include "content/common/webplugin_geometry.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/favicon_url.h"
 #include "content/public/common/file_chooser_params.h"
 #include "content/public/common/menu_item.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/referrer.h"
 #include "content/public/common/renderer_preferences.h"
 #include "content/public/common/stop_find_action.h"
 #include "content/public/common/three_d_api_types.h"
 #include "content/public/common/window_container_type.h"
-#include "content/common/date_time_suggestion.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/channel_layout.h"
 #include "media/base/media_log_event.h"
 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
 #include "third_party/WebKit/public/platform/WebFloatRect.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
 #include "third_party/WebKit/public/web/WebFindOptions.h"
@@ skipping 163 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(default_zoom_level)
   IPC_STRUCT_TRAITS_MEMBER(user_agent_override)
   IPC_STRUCT_TRAITS_MEMBER(accept_languages)
   IPC_STRUCT_TRAITS_MEMBER(report_frame_name_changes)
   IPC_STRUCT_TRAITS_MEMBER(touchpad_fling_profile)
   IPC_STRUCT_TRAITS_MEMBER(touchscreen_fling_profile)
   IPC_STRUCT_TRAITS_MEMBER(tap_multiple_targets_strategy)
   IPC_STRUCT_TRAITS_MEMBER(disable_client_blocked_error_page)
   IPC_STRUCT_TRAITS_MEMBER(plugin_fullscreen_allowed)
   IPC_STRUCT_TRAITS_MEMBER(use_video_overlay_for_embedded_encrypted_video)
+  IPC_STRUCT_TRAITS_MEMBER(deprecated_features_to_enable)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::CookieData)
   IPC_STRUCT_TRAITS_MEMBER(name)
   IPC_STRUCT_TRAITS_MEMBER(value)
   IPC_STRUCT_TRAITS_MEMBER(domain)
   IPC_STRUCT_TRAITS_MEMBER(path)
   IPC_STRUCT_TRAITS_MEMBER(expires)
   IPC_STRUCT_TRAITS_MEMBER(http_only)
   IPC_STRUCT_TRAITS_MEMBER(secure)
@@ skipping 1549 matching lines @@
 // synchronously (see crbug.com/120597). This IPC message sends the character
 // bounds after every composition change to always have correct bound info.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_ImeCompositionRangeChanged,
                     gfx::Range /* composition range */,
                     std::vector<gfx::Rect> /* character bounds */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.