Making plugins work on Windows CE. There many crashes do to subclassing. This addresses those problem by not subclassing. This is WinCE only. r/sr=jst. a=asa. Relanding

modules/plugin/base/src/nsPluginHostImpl.cpp

@@ -2545,6 +2545,10 @@ nsPluginHostImpl::nsPluginHostImpl()
 
     mPrefService->GetBoolPref("plugin.default_plugin_disabled", &tmp);
     mDefaultPluginDisabled = tmp;
+
+#ifdef WINCE
+    mDefaultPluginDisabled = PR_TRUE;
+#endif
   }
 
   nsCOMPtr<nsIObserverService> obsService = do_GetService("@mozilla.org/observer-service;1");

modules/plugin/base/src/nsPluginNativeWindowWin.cpp

@@ -129,8 +129,10 @@ public:
   virtual nsresult CallSetWindow(nsCOMPtr<nsIPluginInstance> &aPluginInstance);
 
 private:
+#ifndef WINCE
   nsresult SubclassAndAssociateWindow();
   nsresult UndoSubclassAndAssociateWindow();
+#endif
 
 public:
   // locals
@@ -474,17 +476,25 @@ nsresult nsPluginNativeWindowWin::CallSetWindow(nsCOMPtr<nsIPluginInstance> &aPl
 {
   // check the incoming instance, null indicates that window is going away and we are
   // not interested in subclassing business any more, undo and don't subclass
+
+  // WINCE does not subclass windows.  See bug 300011 for the details.
+#ifndef WINCE
   if (!aPluginInstance)
     UndoSubclassAndAssociateWindow();
+#endif
 
   nsPluginNativeWindow::CallSetWindow(aPluginInstance);
 
+#ifndef WINCE
   if (aPluginInstance)
     SubclassAndAssociateWindow();
+#endif
 
   return NS_OK;
 }
 
+#ifndef WINCE
+
 nsresult nsPluginNativeWindowWin::SubclassAndAssociateWindow()
 {
   if (type != nsPluginWindowType_Window)
@@ -532,6 +542,7 @@ nsresult nsPluginNativeWindowWin::UndoSubclassAndAssociateWindow()
 
   return NS_OK;
 }
+#endif // WINCE
 
 nsresult PLUG_NewPluginNativeWindow(nsPluginNativeWindow ** aPluginNativeWindow)
 {