content: Make sure the renderer notifies the browser about touch-event handlers properly.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 5ddb42dfe015743edc00432ac6ead85f60199444..038cfc51bbb6e12e635959b7ef1027a965e9f604 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -289,6 +289,8 @@ bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnMsgBlur)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidChangeNumTouchEvents,
                         OnMsgDidChangeNumTouchEvents)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_HasTouchEventHandlers,
+                        OnMsgHasTouchEventHandlers)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnMsgSetCursor)
     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
                         OnMsgTextInputStateChanged)
@@ -1560,6 +1562,10 @@ void RenderWidgetHostImpl::OnMsgDidChangeNumTouchEvents(int count) {
   has_touch_handler_ = count > 0;
 }
 
+void RenderWidgetHostImpl::OnMsgHasTouchEventHandlers(bool has_handlers) {
+  has_touch_handler_ = has_handlers;
+}
+
 void RenderWidgetHostImpl::OnMsgSetCursor(const WebCursor& cursor) {
   if (!view_) {
     return;