Create a public API around webkit::ppapi::PluginInstance and use it in chrome. After this, webkit/p…

chrome/renderer/pepper/pepper_flash_renderer_host.cc

Index: chrome/renderer/pepper/pepper_flash_renderer_host.cc
===================================================================
--- chrome/renderer/pepper/pepper_flash_renderer_host.cc	(revision 213350)
+++ chrome/renderer/pepper/pepper_flash_renderer_host.cc	(working copy)
@@ -92,7 +92,7 @@
   webkit::ppapi::PluginInstance* plugin_instance =
       host_->GetPluginInstance(pp_instance());
   if (plugin_instance)
-    plugin_instance->set_always_on_top(on_top);
+    plugin_instance->SetAlwaysOnTop(on_top);
   // Since no reply is sent for this message, it doesn't make sense to return an
   // error.
   return PP_OK;