Add a new ThreatSource type to indicate SBHit is from client side detection.

chrome/browser/safe_browsing/client_side_detection_host.cc

Index: chrome/browser/safe_browsing/client_side_detection_host.cc
diff --git a/chrome/browser/safe_browsing/client_side_detection_host.cc b/chrome/browser/safe_browsing/client_side_detection_host.cc
index f7cb75049e443c4c10e1e4c1ac61b367c8ea44db..7b427a586ff424d36dee818427eb5e83c2ce7313 100644
--- a/chrome/browser/safe_browsing/client_side_detection_host.cc
+++ b/chrome/browser/safe_browsing/client_side_detection_host.cc
@@ -555,6 +555,8 @@ void ClientSideDetectionHost::MaybeShowPhishingWarning(GURL phishing_url,
       resource.original_url = phishing_url;
       resource.is_subresource = false;
       resource.threat_type = SB_THREAT_TYPE_CLIENT_SIDE_PHISHING_URL;
+      resource.threat_source =
+          safe_browsing::ThreatSource::CLIENT_SIDE_DETECTION;
       resource.render_process_host_id =
           web_contents()->GetRenderProcessHost()->GetID();
       resource.render_frame_id = web_contents()->GetMainFrame()->GetRoutingID();
@@ -585,6 +587,8 @@ void ClientSideDetectionHost::MaybeShowMalwareWarning(GURL original_url,
       resource.original_url = original_url;
       resource.is_subresource = (malware_url.host() != original_url.host());
       resource.threat_type = SB_THREAT_TYPE_CLIENT_SIDE_MALWARE_URL;
+      resource.threat_source =
+          safe_browsing::ThreatSource::CLIENT_SIDE_DETECTION;
       resource.render_process_host_id =
           web_contents()->GetRenderProcessHost()->GetID();
       resource.render_frame_id = web_contents()->GetMainFrame()->GetRoutingID();