SyntheticGestureTarget implementation for injecting synthetic input events

content/browser/renderer_host/render_widget_host_view_base.cc

Index: content/browser/renderer_host/render_widget_host_view_base.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_base.cc b/content/browser/renderer_host/render_widget_host_view_base.cc
index 320e3e1757e4b7ed4dbf79341cd65bf17eaccf3c..5c505174dd7c0553417f1637ac4385e1d5c32d2b 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -8,6 +8,7 @@
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.h"
+#include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/port/browser/render_widget_host_view_frame_subscriber.h"
@@ -528,6 +529,11 @@ void RenderWidgetHostViewBase::ProcessAckedTouchEvent(
     const TouchEventWithLatencyInfo& touch, InputEventAckState ack_result) {
 }
 
+SyntheticGestureTarget*
+RenderWidgetHostViewBase::CreateSyntheticGestureTarget() {
+  return new SyntheticGestureTargetBase(this);
+}
+
 // Platform implementation should override this method to allow frame
 // subscription. Frame subscriber is set to RenderProcessHost, which is
 // platform independent. It should be set to the specific presenter on each