Set the SRT prompt experiment to on by default.

chrome/browser/safe_browsing/srt_field_trial_win.cc

 // Copyright 2015 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/safe_browsing/srt_field_trial_win.h"
 
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace {
 
 // Field trial strings.
 const char kSRTCanaryGroupName[] = "SRTCanary";
 const char kSRTPromptTrialName[] = "SRTPromptFieldTrial";
-const char kSRTPromptOnGroup[] = "On";
-const char kSRTPromptDefaultGroup[] = "Default";
+const char kSRTPromptOffGroup[] = "Off";
 const char kSRTPromptSeedParamName[] = "Seed";
 
 // The download links of the Software Removal Tool.
 const char kMainSRTDownloadURL[] =
     "http://dl.google.com/dl"
     "/softwareremovaltool/win/software_removal_tool.exe?chrome-prompt=1";
 const char kCanarySRTDownloadURL[] =
     "http://dl.google.com/dl"
     "/softwareremovaltool/win/c/software_removal_tool.exe?chrome-prompt=1";
 
 }  // namespace
 
 namespace safe_browsing {
 
 bool IsInSRTPromptFieldTrialGroups() {
   return base::FieldTrialList::FindFullName(kSRTPromptTrialName) !=
-         kSRTPromptDefaultGroup;
+         kSRTPromptOffGroup;
 }
 
 const char* GetSRTDownloadURL() {
   if (base::FieldTrialList::FindFullName(kSRTPromptTrialName) ==
       kSRTCanaryGroupName)
     return kCanarySRTDownloadURL;
   return kMainSRTDownloadURL;
 }
 
 std::string GetIncomingSRTSeed() {
   return variations::GetVariationParamValue(kSRTPromptTrialName,
                                             kSRTPromptSeedParamName);
 }
 
 void RecordSRTPromptHistogram(SRTPromptHistogramValue value) {
   UMA_HISTOGRAM_ENUMERATION("SoftwareReporter.PromptUsage", value,
                             SRT_PROMPT_MAX);
 }
 
 }  // namespace safe_browsing