Set up Finch trial for malware download warnings

chrome/browser/download/download_danger_prompt.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/download/download_danger_prompt.h"
 
 #include "base/bind.h"
+#include "base/metrics/field_trial.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
+#include "chrome/browser/download/download_util.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_item.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
@@ skipping 75 matching lines @@
 }
 
 string16 DownloadDangerPromptImpl::GetTitle() {
   return l10n_util::GetStringUTF16(IDS_CONFIRM_KEEP_DANGEROUS_DOWNLOAD_TITLE);
 }
 
 string16 DownloadDangerPromptImpl::GetMessage() {
   if (!show_context_)
     return l10n_util::GetStringUTF16(
         IDS_PROMPT_CONFIRM_KEEP_DANGEROUS_DOWNLOAD);
+  std::string trial_condition =
+      base::FieldTrialList::FindFullName(download_util::kFinchTrialName);
   switch (download_->GetDangerType()) {
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_FILE:
       return l10n_util::GetStringFUTF16(
           IDS_PROMPT_DANGEROUS_DOWNLOAD,
           download_->GetFileNameToReportUser().LossyDisplayName());
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_URL: // Fall through
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_CONTENT:
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST:

[Dan Beam, 2013/08/09 23:24:51]

nit: lower |trial_condition| to here

[felt, 2013/08/09 23:48:34]

I don't think I can do this because of compiler errors (see next comment too)

-      return l10n_util::GetStringFUTF16(
-          IDS_PROMPT_MALICIOUS_DOWNLOAD_CONTENT,
-          download_->GetFileNameToReportUser().LossyDisplayName());
+      if (trial_condition.empty()) {
+        return l10n_util::GetStringFUTF16(
+            IDS_PROMPT_MALICIOUS_DOWNLOAD_CONTENT,
+            download_->GetFileNameToReportUser().LossyDisplayName());
+      } else {

[Dan Beam, 2013/08/10 00:13:56]

and here

[felt, 2013/08/10 00:33:00]

Done.

+        return download_util::AssembleMalwareFinchString(
+            trial_condition,
+            download_->GetFileNameToReportUser().LossyDisplayName());
+      }
     case content::DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT:
       return l10n_util::GetStringFUTF16(
           IDS_PROMPT_UNCOMMON_DOWNLOAD_CONTENT,
           download_->GetFileNameToReportUser().LossyDisplayName());
     case content::DOWNLOAD_DANGER_TYPE_POTENTIALLY_UNWANTED:
       return l10n_util::GetStringFUTF16(
           IDS_PROMPT_DOWNLOAD_CHANGES_SEARCH_SETTINGS,
           download_->GetFileNameToReportUser().LossyDisplayName());
     case content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS:
     case content::DOWNLOAD_DANGER_TYPE_MAYBE_DANGEROUS_CONTENT:
@@ skipping 43 matching lines @@
     content::DownloadItem* item,
     content::WebContents* web_contents,
     bool show_context,
     const OnDone& done) {
   DownloadDangerPromptImpl* prompt = new DownloadDangerPromptImpl(
       item, web_contents, show_context, done);
   // |prompt| will be deleted when the dialog is done.
   TabModalConfirmDialog::Create(prompt, web_contents);
   return prompt;
 }