Fix webview crash on attempt to scroll.

content/public/test/browser_test_utils.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.
 
 #ifndef CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 
 #include <queue>
 #include <string>
 #include <vector>
@@ skipping 112 matching lines @@
 // Simulate a mouse wheel event.
 void SimulateMouseWheelEvent(WebContents* web_contents,
                              const gfx::Point& point,
                              const gfx::Vector2d& delta);
 
 // Sends a simple, three-event (Begin/Update/End) gesture scroll.
 void SimulateGestureScrollSequence(WebContents* web_contents,
                                    const gfx::Point& point,
                                    const gfx::Vector2dF& delta);
 
+void SimulateGestureFlingSequence(WebContents* web_contents,
+                                  const gfx::Point& point,
+                                  const gfx::Vector2dF& velocity);
+
 // Taps the screen at |point|.
 void SimulateTapAt(WebContents* web_contents, const gfx::Point& point);
 
 #if defined(USE_AURA)
 // Generates a TouchStart at |point|.
 void SimulateTouchPressAt(WebContents* web_contents, const gfx::Point& point);
 #endif
 
 // Taps the screen with modifires at |point|.
 void SimulateTapWithModifiersAt(WebContents* web_contents,
@@ skipping 369 matching lines @@
   blink::WebInputEvent::Type wait_for_type_;
   uint32_t ack_result_;
   base::Closure quit_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMsgWatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_