Add some missing ENABLE_PLUGINS ifdefs.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index e422f3c130832ef3d5e657ec8809d8c15d1919cd..906a4bf4ceb01374897aa9ec16660c066d12b4ad 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -734,7 +734,6 @@ void RenderFrameImpl::SimulateImeConfirmComposition(
   render_view_->OnImeConfirmComposition(text, replacement_range, false);
 }
 
-
 void RenderFrameImpl::OnImeSetComposition(
     const base::string16& text,
     const std::vector<blink::WebCompositionUnderline>& underlines,
@@ -814,7 +813,7 @@ void RenderFrameImpl::OnImeConfirmComposition(
   pepper_composition_text_.clear();
 }
 
-#endif  // ENABLE_PLUGINS
+#endif  // defined(ENABLE_PLUGINS)
 
 MediaStreamDispatcher* RenderFrameImpl::GetMediaStreamDispatcher() {
   if (!web_user_media_client_)