Remove a bunch of NPAPI quirks and related support code

content/plugin/webplugin_proxy.h

Index: content/plugin/webplugin_proxy.h
diff --git a/content/plugin/webplugin_proxy.h b/content/plugin/webplugin_proxy.h
index 3703056393709df636b5ea4df5df12ca88115ae1..a3386a74ec917a31bdbd8f1e1e640d04e92ebdce 100644
--- a/content/plugin/webplugin_proxy.h
+++ b/content/plugin/webplugin_proxy.h
@@ -72,10 +72,6 @@ class WebPluginProxy : public WebPlugin,
   void DidStartLoading() override;
   void DidStopLoading() override;
   bool IsOffTheRecord() override;
-#if defined(OS_WIN)
-  void SetWindowlessData(HANDLE pump_messages_event,
-                         gfx::NativeViewId dummy_activation_window) override;
-#endif
 #if defined(OS_MACOSX)
   void FocusChanged(bool focused) override;
   void StartIme() override;
@@ -107,14 +103,6 @@ class WebPluginProxy : public WebPlugin,
   // Callback from the renderer to let us know that a paint occurred.
   void DidPaint();
 
-#if defined(OS_WIN) && !defined(USE_AURA)
-  // Retrieves the IME status from a windowless plugin and sends it to a
-  // renderer process. A renderer process will convert the coordinates from
-  // local to the window coordinates and send the converted coordinates to a
-  // browser process.
-  void UpdateIMEStatus();
-#endif
-
  private:
   class SharedTransportDIB : public base::RefCounted<SharedTransportDIB> {
    public: