plugins: Some obvious ifdef removals (code that previously wouldn't link).

chrome/renderer/render_view.cc

Index: chrome/renderer/render_view.cc
diff --git a/chrome/renderer/render_view.cc b/chrome/renderer/render_view.cc
index bce6d4c975e51e764c74f3f2764ddffb94c8f076..0f085dc7b35ddd2e6494fce29c71345b4197d20e 100644
--- a/chrome/renderer/render_view.cc
+++ b/chrome/renderer/render_view.cc
@@ -257,16 +257,8 @@ void RenderView::PluginDestroyed(WebPluginDelegateProxy* proxy) {
   // clicks the info bar to install. Unfortunately we are getting
   // PluginDestroyed in single process mode. However, that is not a huge
   // concern.
-#if defined(OS_WIN)
   if (proxy == first_default_plugin_)
     first_default_plugin_ = NULL;
-#else
-  // TODO(port): because of the headers that we aren't including, the compiler
-  // has only seen a forward decl, not the subclass relation. Thus it doesn't
-  // know that the two pointer types compared above are comparable. Once we
-  // port and include the headers this problem should go away.
-  NOTIMPLEMENTED();
-#endif
 }
 
 void RenderView::PluginCrashed(const FilePath& plugin_path) {