Avoid sending touchmove events where all pointers are stationary

content/common/input/touch_event_stream_validator.cc

 // 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.
 
 #include "content/common/input/touch_event_stream_validator.h"
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "content/common/input/web_touch_event_traits.h"
@@ skipping 121 matching lines @@
       case WebTouchPoint::StateMoved:
         if (event.type != WebInputEvent::TouchMove) {
           error_msg->append(StringPrintf(
               "Moved touch point (id=%d) outside touchmove.\n", point.id));
         } else {
           found_valid_state_for_type = true;
         }
         break;
 
       case WebTouchPoint::StateStationary:
-        // TODO(jdduke): Remove this after implementing TouchMove events
-        // filtering based on corrected touches state in TouchEventQueue,
-        // crbug.com/452032.
-        if (event.type == WebInputEvent::TouchMove)
-          found_valid_state_for_type = true;
-
         break;
 
       case WebTouchPoint::StateCancelled:
         if (event.type != WebInputEvent::TouchCancel) {
           error_msg->append(StringPrintf(
               "Cancelled touch point (id=%d) outside touchcancel.\n",
               point.id));
         } else {
           found_valid_state_for_type = true;
         }
         break;
     }
   }
 
   if (!found_valid_state_for_type) {
     error_msg->append(
         StringPrintf("No valid touch point corresponding to event type: %s\n",
                      WebInputEventTraits::GetName(event.type)));
   }
 
   return error_msg->empty();
 }
 
 }  // namespace content