Set up Finch trial for malware download warnings

chrome/browser/download/download_util.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.
 //
 // Download utility implementation
 
 #include "chrome/browser/download/download_util.h"
 
 #include <cmath>
 #include <string>
@@ skipping 251 matching lines @@
 void RecordDownloadCount(ChromeDownloadCountTypes type) {
   UMA_HISTOGRAM_ENUMERATION(
       "Download.CountsChrome", type, CHROME_DOWNLOAD_COUNT_TYPES_LAST_ENTRY);
 }
 
 void RecordDownloadSource(ChromeDownloadSource source) {
   UMA_HISTOGRAM_ENUMERATION(
       "Download.SourcesChrome", source, CHROME_DOWNLOAD_SOURCE_LAST_ENTRY);
 }
 
+string16 AssembleMalwareFinchString(const std::string& trialCondition,
+                                    const string16& elided_filename) {
+  // Sanity check to make sure we have a filename.
+  string16 filename;
+  if (elided_filename == string16()) {

[asanka, 2013/08/09 18:50:17]

Nit: elided_filename.empty()

[felt, 2013/08/09 19:13:15]

Done.

+    filename = ASCIIToUTF16("This file");
+  } else {
+    filename = elided_filename;
+  }
+  // Set the message text according to the condition.
+  string16 message_text;
+  if (trialCondition == kCondition1Control) {
+    message_text = ASCIIToUTF16("This file appears malicious.");
+  } else if (trialCondition == kCondition2Control) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 appears malicious."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition3Malicious) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is malicious."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition4Unsafe) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is unsafe."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition5Dangerous) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is dangerous."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition6Harmful) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is harmful."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition7DiscardSecond) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is malicious. Discard this file to stay safe."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition8DiscardFirst) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("Discard this file to stay safe. $1 is malicious."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition9SafeDiscard) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is malicious. To stay safe, discard it."),
+        filename,
+        NULL);
+  } else if (trialCondition == kCondition10SafeDontRun) {
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 is malicious. To stay safe, don't run it."),
+        filename,
+        NULL);
+  } else {
+    // We use the second control as a default for other conditions that don't
+    // change the warning string.
+    message_text = ReplaceStringPlaceholders(
+        ASCIIToUTF16("$1 appears malicious."),
+        filename,
+        NULL);
+  }
+  return message_text;
+}
+
 }  // namespace download_util