ifdef out a bunch of Mac-specific code

This is a hacky solution but helps us deal with other compiler/linker errors.

brightray/browser/inspectable_web_contents_impl.cc

@@ -41,7 +41,9 @@ InspectableWebContentsImpl::InspectableWebContentsImpl(content::WebContents* web
   auto context = static_cast<BrowserContext*>(web_contents_->GetBrowserContext());
   dock_side_ = context->prefs()->GetString(kDockSidePref);
 
+#if defined(OS_MACOSX)
   view_.reset(CreateInspectableContentsView(this));
+#endif
 }
 
 InspectableWebContentsImpl::~InspectableWebContentsImpl() {