Pepper and WebKit API change to support a plugin knowing if a scrollbar is an overlay one.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
===================================================================
--- webkit/plugins/ppapi/ppapi_plugin_instance.cc	(revision 95420)
+++ webkit/plugins/ppapi/ppapi_plugin_instance.cc	(working copy)
@@ -14,6 +14,7 @@
 #include "ppapi/c/dev/ppb_memory_dev.h"
 #include "ppapi/c/dev/ppb_zoom_dev.h"
 #include "ppapi/c/dev/ppp_find_dev.h"
+#include "ppapi/c/dev/ppp_resize_dev.h"
 #include "ppapi/c/dev/ppp_policy_update_dev.h"
 #include "ppapi/c/dev/ppp_selection_dev.h"
 #include "ppapi/c/dev/ppp_zoom_dev.h"
@@ -223,6 +224,7 @@
       plugin_private_interface_(NULL),
       plugin_pdf_interface_(NULL),
       plugin_policy_updated_interface_(NULL),
+      plugin_resize_interface_(NULL),
       plugin_selection_interface_(NULL),
       plugin_zoom_interface_(NULL),
       checked_for_plugin_input_event_interface_(false),
@@ -672,6 +674,18 @@
   plugin_find_interface_->StopFind(pp_instance());
 }
 
+void PluginInstance::WillStartLiveResize() {
+  if (!LoadResizeInterface())
+    return;
+  plugin_resize_interface_->WillStartLiveResize(pp_instance());
+}
+
+void PluginInstance::WillEndLiveResize() {
+  if (!LoadResizeInterface())
+    return;
+  plugin_resize_interface_->WillEndLiveResize(pp_instance());
+}
+
 bool PluginInstance::LoadFindInterface() {
   if (!plugin_find_interface_) {
     plugin_find_interface_ =
@@ -752,6 +766,16 @@
   return !!plugin_private_interface_;
 }
 
+bool PluginInstance::LoadResizeInterface() {
+  if (!plugin_resize_interface_) {
+    plugin_resize_interface_ =
+        static_cast<const PPP_Resize_Dev*>(module_->GetPluginInterface(
+            PPP_RESIZE_DEV_INTERFACE));
+  }
+
+  return !!plugin_resize_interface_;
+}
+
 bool PluginInstance::LoadSelectionInterface() {
   if (!plugin_selection_interface_) {
     plugin_selection_interface_ =