Route touch-events for WebViewGuest directly to guest renderer.

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index caea620ccdd8df70404311af6bb4d0d6e0e751ac..e75385557dc7c39303f6e6cd6265d746679ff8c5 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -46,6 +46,10 @@ class WebMouseEvent;
 class WebMouseWheelEvent;
 }
 
+namespace ui {
+class LatencyInfo;
+}
+
 namespace content {
 class BrowserAccessibilityDelegate;
 class BrowserAccessibilityManager;
@@ -192,6 +196,8 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   virtual void ProcessKeyboardEvent(const NativeWebKeyboardEvent& event) {}
   virtual void ProcessMouseEvent(const blink::WebMouseEvent& event) {}
   virtual void ProcessMouseWheelEvent(const blink::WebMouseWheelEvent& event) {}
+  virtual void ProcessTouchEvent(const blink::WebTouchEvent& event,
+                         const ui::LatencyInfo& latency) {}
 
   //----------------------------------------------------------------------------
   // The following static methods are implemented by each platform.