[Android] Always insert a TouchCancel if window or tab focus is lost

content/browser/renderer_host/input/web_input_event_util.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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_WEB_INPUT_EVENT_UTIL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_WEB_INPUT_EVENT_UTIL_H_
 
 #include "content/common/content_export.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
-namespace blink {
-class WebKeyboardEvent;
+namespace ui {
+class MotionEvent;
 }
 
 namespace content {
 
 // Update |event|'s windowsKeyCode and keyIdentifer properties using the
 // provided |windows_key_code|.
 CONTENT_EXPORT void UpdateWindowsKeyCodeAndKeyIdentifier(
     blink::WebKeyboardEvent* event,
     ui::KeyboardCode windows_key_code);
 
+// Creates a WebTouchEvent from |event|, scaling all size components from
+// |event| by |scale|.
+CONTENT_EXPORT blink::WebTouchEvent
+CreateWebTouchEventFromMotionEvent(const ui::MotionEvent& event, float scale);
+
 }
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_WEB_INPUT_EVENT_UTIL_H_