Add a new group policy to disable safe browsing for files downloaded from trusted sources.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 2f4e2f1206c96fc01e1fe60c6c5fca0714993f39..15ca32a97f38d02cb7ab30b476ace30bc3e923bc 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -769,6 +769,10 @@ const char kSystemLogUploadFrequency[] = "system-log-upload-frequency";
 // Passes the name of the current running automated test to Chrome.
 const char kTestName[]                      = "test-name";
 
+// Identifies a list of download sources as trusted, but only if proper group
+// policy is set.
+const char kTrustedDownloadSources[] = "trusted-download-sources";
+
 // Experimental. Shows a dialog asking the user to try chrome. This flag is to
 // be used only by the upgrade process.
 const char kTryChromeAgain[]                = "try-chrome-again";