Reverting this to see if the Flash crashes on Mac canary are due to this CL.

content/plugin/webplugin_proxy.cc

Index: content/plugin/webplugin_proxy.cc
===================================================================
--- content/plugin/webplugin_proxy.cc	(revision 89220)
+++ content/plugin/webplugin_proxy.cc	(working copy)
@@ -94,11 +94,6 @@
   if (accelerated_surface_.get())
     accelerated_surface_.reset();
 #endif
-
-  if (plugin_element_)
-    WebBindings::releaseObject(plugin_element_);
-  if (window_npobject_)
-    WebBindings::releaseObject(window_npobject_);
 }
 
 bool WebPluginProxy::Send(IPC::Message* msg) {
@@ -201,7 +196,7 @@
 
 NPObject* WebPluginProxy::GetWindowScriptNPObject() {
   if (window_npobject_)
-    return window_npobject_;
+    return WebBindings::retainObject(window_npobject_);
 
   int npobject_route_id = channel_->GenerateRouteID();
   bool success = false;
@@ -218,7 +213,7 @@
 
 NPObject* WebPluginProxy::GetPluginElement() {
   if (plugin_element_)
-    return plugin_element_;
+    return WebBindings::retainObject(plugin_element_);
 
   int npobject_route_id = channel_->GenerateRouteID();
   bool success = false;