Add a help center link to NaCl infobar

chrome/browser/nacl_host/nacl_infobar.cc

Index: chrome/browser/nacl_host/nacl_infobar.cc
diff --git a/chrome/browser/nacl_host/nacl_infobar.cc b/chrome/browser/nacl_host/nacl_infobar.cc
index eb6fe358d67b4a5a9670391f0198074377ad2525..6b5dcea319a61957658a212fcfbced79591bc774 100644
--- a/chrome/browser/nacl_host/nacl_infobar.cc
+++ b/chrome/browser/nacl_host/nacl_infobar.cc
@@ -5,21 +5,66 @@
 #include "chrome/browser/nacl_host/nacl_infobar.h"
 
 #include "base/bind.h"
+#include "base/string16.h"
+#include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
 #include "chrome/browser/api/infobars/infobar_service.h"
-#include "chrome/browser/api/infobars/simple_alert_infobar_delegate.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "googleurl/src/gurl.h"
 #include "grit/generated_resources.h"
 #include "ppapi/c/private/ppb_nacl_private.h"
 #include "ui/base/l10n/l10n_util.h"
 
-
 using content::BrowserThread;
 using content::RenderViewHost;
 using content::WebContents;
 
 namespace {
+// The URL for the "learn more" article.
+const char kNaClLearnMoreUrl[] =
+    "https://support.google.com/chrome/?p=ib_nacl";
+
+// A simple LinkInfoBarDelegate doesn't support making the link right-aligned
+// so use a ConfirmInfoBarDelegate without any buttons instead.
+class NaClInfoBarDelegate : public ConfirmInfoBarDelegate {
+ public:
+  virtual string16 GetMessageText() const OVERRIDE;
+  virtual string16 GetLinkText() const OVERRIDE;
+  virtual bool LinkClicked(WindowOpenDisposition disposition) OVERRIDE;
+  virtual int GetButtons() const OVERRIDE;
+  static void Create(InfoBarService* ibs, WebContents* wc);
+ private:
+  NaClInfoBarDelegate(WebContents* wc, InfoBarService* ibs) :
+      ConfirmInfoBarDelegate(ibs), wc_(wc) {}
+  WebContents* wc_;
+};
+
+string16 NaClInfoBarDelegate::GetMessageText() const {
+  return l10n_util::GetStringUTF16(IDS_NACL_APP_MISSING_ARCH_MESSAGE);
+}
+
+string16 NaClInfoBarDelegate::GetLinkText() const {
+  return l10n_util::GetStringUTF16(IDS_LEARN_MORE);
+}
+
+bool NaClInfoBarDelegate::LinkClicked(WindowOpenDisposition disposition) {
+  content::OpenURLParams params(
+      GURL(kNaClLearnMoreUrl), content::Referrer(),
+      (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
+      content::PAGE_TRANSITION_LINK,
+      false);
+  wc_->OpenURL(params);
+  return false;
+}
+
+int NaClInfoBarDelegate::GetButtons() const { return BUTTON_NONE; }
+
+// static
+void NaClInfoBarDelegate::Create(InfoBarService* ibs, WebContents *wc) {
+  ibs->AddInfoBar(scoped_ptr<InfoBarDelegate>(
+      new NaClInfoBarDelegate(wc, ibs)));
+}
 
 void ShowInfobar(int render_process_id, int render_view_id,
                  int error_id) {
@@ -29,9 +74,7 @@ void ShowInfobar(int render_process_id, int render_view_id,
   RenderViewHost* rvh = RenderViewHost::FromID(render_process_id,
                                                render_view_id);
   WebContents* wc = WebContents::FromRenderViewHost(rvh);
-  InfoBarService* ibs = InfoBarService::FromWebContents(wc);
-  SimpleAlertInfoBarDelegate::Create(ibs, NULL,
-        l10n_util::GetStringUTF16(IDS_NACL_APP_MISSING_ARCH_MESSAGE), true);
+  NaClInfoBarDelegate::Create(InfoBarService::FromWebContents(wc), wc);
 }
 
 }  // namespace