Add field trial and flag to mark HTTP as non-secure.

chrome/browser/ui/toolbar/toolbar_model_impl.cc

Index: chrome/browser/ui/toolbar/toolbar_model_impl.cc
diff --git a/chrome/browser/ui/toolbar/toolbar_model_impl.cc b/chrome/browser/ui/toolbar/toolbar_model_impl.cc
index 8f2edcd0c7b07c1d13c637eff1042f1a1c57b671..ca3122b1e04d38607f74bb0356c80cd430fe4e28 100644
--- a/chrome/browser/ui/toolbar/toolbar_model_impl.cc
+++ b/chrome/browser/ui/toolbar/toolbar_model_impl.cc
@@ -65,6 +65,20 @@ bool GetSecurityLevelForFieldTrialGroup(const std::string& group,
   return true;
 }
 
+ToolbarModel::SecurityLevel GetSecurityLevelForHttpFieldTrial() {
+  std::string group = base::FieldTrialList::FindFullName("MarkHTTPAsNonSecure");
+  std::string choice = base::CommandLine::ForCurrentProcess()->
+      GetSwitchValueASCII(switches::kMarkHttpAsNonSecure);
+
+  if (choice == "no" || group == "no")

[felt, 2014/12/23 01:34:58]

Doesn't this mean that as long as the Finch trial is serving "no" (which will be
the initial default), there won't be any way to opt in to another treatment?

[palmer, 2015/01/07 00:59:00]

You're right, thanks. Changing it so that the user's choice always takes
precedence.

+    return ToolbarModel::NONE;
+  else if (choice == "dubious" || group == "dubious")
+    return ToolbarModel::SECURITY_WARNING;
+  else if (choice == "non-secure" || group == "non-secure")
+    return ToolbarModel::SECURITY_ERROR;
+  return ToolbarModel::NONE;
+}
+
 }  // namespace
 
 ToolbarModelImpl::ToolbarModelImpl(ToolbarModelDelegate* delegate)
@@ -87,9 +101,15 @@ ToolbarModel::SecurityLevel ToolbarModelImpl::GetSecurityLevelForWebContents(
   const SSLStatus& ssl = entry->GetSSL();
   switch (ssl.security_style) {
     case content::SECURITY_STYLE_UNKNOWN:
-    case content::SECURITY_STYLE_UNAUTHENTICATED:
       return NONE;
 
+    case content::SECURITY_STYLE_UNAUTHENTICATED: {
+      const GURL& url = entry->GetURL();
+      if (url.SchemeIs("http") || url.SchemeIs("ftp"))
+        return GetSecurityLevelForHttpFieldTrial();
+      return NONE;
+    }
+
     case content::SECURITY_STYLE_AUTHENTICATION_BROKEN:
       return SECURITY_ERROR;