Reenable overlay scrollbars

content/renderer/input/input_handler_proxy.cc

 // 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.
 
 #include "content/renderer/input/input_handler_proxy.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "content/renderer/input/input_handler_proxy_client.h"
@@ skipping 211 matching lines @@
     for (size_t i = 0; i < touch_event.touchesLength; ++i) {
       if (touch_event.touches[i].state != WebTouchPoint::StatePressed)
         continue;
       if (input_handler_->HaveTouchEventHandlersAt(touch_event.touches[i]
                                                        .position))
         return DID_NOT_HANDLE;
     }
     return DROP_EVENT;
   } else if (WebInputEvent::isKeyboardEventType(event.type)) {
     CancelCurrentFling();
+  } else if (event.type == WebInputEvent::MouseMove) {
+    const WebMouseEvent& mouse_event =
+        *static_cast<const WebMouseEvent*>(&event);
+    // TODO(tony): Ignore when mouse buttons are down?
+    // TODO(davemoore): This should never happen, but bug #326635 showed some
+    // surprising crashes.
+    CHECK(input_handler_);
+    input_handler_->MouseMoveAt(gfx::Point(mouse_event.x, mouse_event.y));
   }
 
   return DID_NOT_HANDLE;
 }
 
 InputHandlerProxy::EventDisposition
 InputHandlerProxy::HandleGestureFling(
     const WebGestureEvent& gesture_event) {
   cc::InputHandler::ScrollStatus scroll_status;
 
@@ skipping 225 matching lines @@
   TRACE_EVENT2("renderer",
                "InputHandlerProxy::notifyCurrentFlingVelocity",
                "vx",
                velocity.width,
                "vy",
                velocity.height);
   input_handler_->NotifyCurrentFlingVelocity(ToClientScrollIncrement(velocity));
 }
 
 }  // namespace content