Explicitly use HTTPS to download the CCT binary

chrome/browser/safe_browsing/srt_field_trial_win.cc

Index: chrome/browser/safe_browsing/srt_field_trial_win.cc
diff --git a/chrome/browser/safe_browsing/srt_field_trial_win.cc b/chrome/browser/safe_browsing/srt_field_trial_win.cc
index 5b4ce1b5970690684af3747995ec58560a0e2f67..249b274d3071dbd8622775728328a89dd3e494da 100644
--- a/chrome/browser/safe_browsing/srt_field_trial_win.cc
+++ b/chrome/browser/safe_browsing/srt_field_trial_win.cc
@@ -25,10 +25,10 @@ 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