Touch event flag should control only DOM event firing.

content/public/common/web_preferences.h

 // Copyright 2014 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 CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 #define CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "ui/base/touch/touch_device.h"

[mustaq, 2016/11/16 14:54:16]

Please remove.

[sunyunjia, 2016/11/16 16:39:58]

This is actually needed. What we want to delete is "touch_enabled.h"

 #include "url/gurl.h"
 
 namespace blink {
 class WebView;
 }
 
 namespace content {
 
 // Map of ISO 15924 four-letter script code to font family.  For example,
 // "Arab" to "My Arabic Font".
@@ skipping 125 matching lines @@
   // TODO(jww): Remove when WebView no longer needs this exception.
   bool allow_geolocation_on_insecure_origins;
   // Disallow user opt-in for blockable mixed content.
   bool strictly_block_blockable_mixed_content;
   bool block_mixed_plugin_content;
   bool password_echo_enabled;
   bool should_print_backgrounds;
   bool should_clear_document_background;
   bool enable_scroll_animator;
   bool css_variables_enabled;
-  bool touch_enabled;
+  bool touch_event_api_enabled;
   // TODO(mustaq): Nuke when the new API is ready
   bool device_supports_touch;
   // TODO(mustaq): Nuke when the new API is ready
   bool device_supports_mouse;
   bool touch_adjustment_enabled;
   int pointer_events_max_touch_points;
   int available_pointer_types;
   ui::PointerType primary_pointer_type;
   int available_hover_types;
   ui::HoverType primary_hover_type;
@@ skipping 94 matching lines @@
   // chrome, except for the cases where it would require lots of extra work for
   // the embedder to use the same default value.
   WebPreferences();
   WebPreferences(const WebPreferences& other);
   ~WebPreferences();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_