Cleanup: decouple web_input_event_aura and ui_events_helper

content/browser/renderer_host/web_input_event_aura.cc

Index: content/browser/renderer_host/web_input_event_aura.cc
diff --git a/content/browser/renderer_host/web_input_event_aura.cc b/content/browser/renderer_host/web_input_event_aura.cc
index e8936c6fb32a52a9620ceaf0d2065bd65bbbbd87..d60ec480670303cb022bc250948deda531702d6b 100644
--- a/content/browser/renderer_host/web_input_event_aura.cc
+++ b/content/browser/renderer_host/web_input_event_aura.cc
@@ -6,7 +6,6 @@
 
 #include "build/build_config.h"
 #include "content/browser/renderer_host/input/web_input_event_util.h"
-#include "content/browser/renderer_host/ui_events_helper.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/window.h"
 #include "ui/events/base_event_utils.h"
@@ -52,6 +51,16 @@ blink::WebPointerProperties::PointerType EventPointerTypeToWebPointerType(
   return blink::WebPointerProperties::PointerType::Unknown;
 }
 
+// Creates a WebGestureEvent from a ui::GestureEvent. Note that it does not
+// populate the event coordinates (i.e. |x|, |y|, |globalX|, and |globalY|). So
+// the caller must populate these fields.

[tapted, 2016/06/27 00:18:38]

(just noticed I'd misplaced this comment, but of course we should keep it! I've
put it back [now in the .cc]).

+blink::WebGestureEvent MakeWebGestureEventFromUIEvent(
+    const ui::GestureEvent& event) {
+  return ui::CreateWebGestureEvent(
+      event.details(), event.time_stamp(), event.location_f(),
+      event.root_location_f(), event.flags(), event.unique_touch_event_id());
+}
+
 }  // namespace
 
 #if defined(OS_WIN)