Explicitly use HTTPS to download the CCT binary

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 "base/strings/string_util.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace {
 
 // Field trial strings.
 const char kSRTPromptTrial[] = "SRTPromptFieldTrial";
 const char kSRTCanaryGroup[] = "SRTCanary";
 const char kSRTPromptOffGroup[] = "Off";
 const char kSRTPromptSeedParam[] = "Seed";
 
 const char kSRTElevationTrial[] = "SRTElevation";
 const char kSRTElevationAsNeededGroup[] = "AsNeeded";
 
 const char kSRTReporterTrial[] = "srt_reporter";
 const char kSRTReporterOffGroup[] = "Off";
 
 // The download links of the Software Removal Tool.
 const char kMainSRTDownloadURL[] =
-    "http://dl.google.com/dl"
+    "https://dl.google.com/dl"
     "/softwareremovaltool/win/chrome_cleanup_tool.exe?chrome-prompt=1";
 const char kCanarySRTDownloadURL[] =
-    "http://dl.google.com/dl"
+    "https://dl.google.com/dl"
     "/softwareremovaltool/win/c/chrome_cleanup_tool.exe?chrome-prompt=1";
 
 }  // namespace
 
 namespace safe_browsing {
 
 bool IsInSRTPromptFieldTrialGroups() {
   return !base::StartsWith(base::FieldTrialList::FindFullName(kSRTPromptTrial),
                            kSRTPromptOffGroup, base::CompareCase::SENSITIVE);
 }
@@ skipping 26 matching lines @@
 void RecordSRTPromptHistogram(SRTPromptHistogramValue value) {
   UMA_HISTOGRAM_ENUMERATION("SoftwareReporter.PromptUsage", value,
                             SRT_PROMPT_MAX);
 }
 
 void RecordReporterStepHistogram(SwReporterUmaValue value) {
   UMA_HISTOGRAM_ENUMERATION("SoftwareReporter.Step", value, SW_REPORTER_MAX);
 }
 
 }  // namespace safe_browsing