webkit/ppapi: Notify the container when a plugin is accepting touch events.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index 3b6f26301caedf8aa8197b04511d6ebe0a29ce75..4b7906ab7aa6f33646f67f5eb03f1ff652c985f1 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -1683,6 +1683,11 @@ void PluginInstance::SimulateImeSetCompositionEvent(
       utf16_text, underlines, offsets[0], offsets[1]);
 }
 
+bool PluginInstance::IsAcceptingTouchEvents() const {
+  return (filtered_input_event_mask_ & PP_INPUTEVENT_CLASS_TOUCH) ||
+      (input_event_mask_ & PP_INPUTEVENT_CLASS_TOUCH);
+}
+
 void PluginInstance::ClosePendingUserGesture(PP_Instance instance,
                                              PP_TimeTicks timestamp) {
   // Close the pending user gesture if the plugin had a chance to respond.
@@ -1876,6 +1881,8 @@ int32_t PluginInstance::RequestInputEvents(PP_Instance instance,
                                            uint32_t event_classes) {
   input_event_mask_ |= event_classes;
   filtered_input_event_mask_ &= ~(event_classes);
+  if (event_classes & PP_INPUTEVENT_CLASS_TOUCH)
+    container_->setAcceptingTouchEvents(IsAcceptingTouchEvents());
   return ValidateRequestInputEvents(false, event_classes);
 }
 
@@ -1883,6 +1890,8 @@ int32_t PluginInstance::RequestFilteringInputEvents(PP_Instance instance,
                                                     uint32_t event_classes) {
   filtered_input_event_mask_ |= event_classes;
   input_event_mask_ &= ~(event_classes);
+  if (event_classes & PP_INPUTEVENT_CLASS_TOUCH)
+    container_->setAcceptingTouchEvents(IsAcceptingTouchEvents());
   return ValidateRequestInputEvents(true, event_classes);
 }
 
@@ -1890,6 +1899,8 @@ void PluginInstance::ClearInputEventRequest(PP_Instance instance,
                                             uint32_t event_classes) {
   input_event_mask_ &= ~(event_classes);
   filtered_input_event_mask_ &= ~(event_classes);
+  if (event_classes & PP_INPUTEVENT_CLASS_TOUCH)
+    container_->setAcceptingTouchEvents(IsAcceptingTouchEvents());
 }
 
 void PluginInstance::ZoomChanged(PP_Instance instance, double factor) {