Implement sidebar support for extension action popups

extensions/browser/extension_host.cc

Index: extensions/browser/extension_host.cc
diff --git a/extensions/browser/extension_host.cc b/extensions/browser/extension_host.cc
index 0b501a6ceef75b17d6f3642b0006dc5499c88288..d7e2afd466786a559a31e89322548aed8ef24948 100644
--- a/extensions/browser/extension_host.cc
+++ b/extensions/browser/extension_host.cc
@@ -67,9 +67,10 @@ ExtensionHost::ExtensionHost(const Extension* extension,
   // Not used for panels, see PanelHost.
   DCHECK(host_type == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE ||
          host_type == VIEW_TYPE_EXTENSION_DIALOG ||
-         host_type == VIEW_TYPE_EXTENSION_POPUP);
+         host_type == VIEW_TYPE_EXTENSION_POPUP ||
+         host_type == VIEW_TYPE_EXTENSION_SIDEBAR);
   host_contents_.reset(WebContents::Create(
-      WebContents::CreateParams(browser_context_, site_instance))),
+      WebContents::CreateParams(browser_context_, site_instance)));
   content::WebContentsObserver::Observe(host_contents_.get());
   host_contents_->SetDelegate(this);
   SetViewType(host_contents_.get(), host_type);
@@ -225,6 +226,11 @@ void ExtensionHost::LoadInitialURL() {
       std::string());
 }
 
+void ExtensionHost::LoadURL(const GURL& url) {
+  initial_url_ = url;
+  LoadInitialURL();
+}
+
 bool ExtensionHost::IsBackgroundPage() const {
   DCHECK_EQ(extension_host_type_, VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
   return true;