Track CTR of uncommon download warning.

chrome/browser/download/download_commands.cc

Index: chrome/browser/download/download_commands.cc
diff --git a/chrome/browser/download/download_commands.cc b/chrome/browser/download/download_commands.cc
index 285ee4f0939f952edfd40cdcfac815c6d09aa92c..0b6e1d740e63b071522074eba33334afedbff202 100644
--- a/chrome/browser/download/download_commands.cc
+++ b/chrome/browser/download/download_commands.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
+#include "chrome/common/safe_browsing/csd.pb.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/google/core/browser/google_util.h"
@@ -278,6 +279,35 @@ void DownloadCommands::ExecuteCommand(Command command) {
       download_item_->Remove();
       break;
     case KEEP:
+    // Only sends uncommon download accept report if :
+    // 1. FULL_SAFE_BROWSING is enabled, and
+    // 2. Download verdict is uncommon, and
+    // 3. Download URL is not empty, and
+    // 4. User is not in incognito mode.
+#if defined(FULL_SAFE_BROWSING)
+      if (download_item_->GetDangerType() ==
+              content::DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT &&
+          !download_item_->GetURL().is_empty() &&
+          !download_item_->GetBrowserContext()->IsOffTheRecord()) {
+        safe_browsing::SafeBrowsingService* sb_service =
+            g_browser_process->safe_browsing_service();
+        // Compiles the uncommon download warning report.
+        safe_browsing::ClientSafeBrowsingReportRequest report;
+        report.set_type(safe_browsing::ClientSafeBrowsingReportRequest::
+                            DANGEROUS_DOWNLOAD_WARNING);
+        report.set_download_verdict(
+            safe_browsing::ClientDownloadResponse::UNCOMMON);
+        report.set_url(download_item_->GetURL().spec());
+        report.set_did_proceed(true);
+        std::string serialized_report;
+        if (report.SerializeToString(&serialized_report)) {
+          sb_service->SendSerializedDownloadReport(serialized_report);
+        } else {
+          DCHECK(false)
+              << "Unable to serialize the uncommon download warning report.";
+        }
+      }
+#endif
       download_item_->ValidateDangerousDownload();
       break;
     case LEARN_MORE_SCANNING: {