[Compositor event queue] Coalesce gesture scroll&pinch of the same sequence

ui/events/blink/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/ui.gni")
 
 source_set("blink") {
   sources = [
     "blink_event_util.cc",
     "blink_event_util.h",
@@ skipping 19 matching lines @@
     "web_input_event_traits.h",
   ]
 
   deps = [
     "//cc:cc",
     "//third_party/WebKit/public:blink_minimal",
     "//ui/events",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
     "//ui/events:gesture_detection",
+    "//ui/gfx:gfx",
     "//ui/gfx/geometry",
   ]
 
   if (is_win) {
     sources += [
       "web_input_event_builders_win.cc",
       "web_input_event_builders_win.h",
     ]
     deps += [ "//ui/display" ]
   }
 }