Wireup SafeBrowsingNavigationObserverManager to help PPAPI download attribution

chrome/browser/safe_browsing/download_protection_service.h

Index: chrome/browser/safe_browsing/download_protection_service.h
diff --git a/chrome/browser/safe_browsing/download_protection_service.h b/chrome/browser/safe_browsing/download_protection_service.h
index 213e2a7443eecf4c0ca144ecd003b68c8b9d7564..53aec789cff52b54db8bec28e455b3c9f2675425 100644
--- a/chrome/browser/safe_browsing/download_protection_service.h
+++ b/chrome/browser/safe_browsing/download_protection_service.h
@@ -129,6 +129,8 @@ class DownloadProtectionService {
 
   virtual void CheckPPAPIDownloadRequest(
       const GURL& requestor_url,
+      const GURL& initiating_frame_url,
+      content::WebContents* web_contents,
       const base::FilePath& default_file_path,
       const std::vector<base::FilePath::StringType>& alternate_extensions,
       Profile* profile,
@@ -296,6 +298,15 @@ class DownloadProtectionService {
     content::WebContents* web_contents,
     ClientDownloadRequest* out_request);
 
+  // If kDownloadAttribution feature is enabled, identify referrer chain of the
+  // PPAPI download based on the frame URL where the download is initiated.
+  // Then add referrer chain info of to ClientDownloadRequest proto. This

[Nathan Parker, 2017/01/04 19:49:12]

s/ of//

[Jialiu Lin, 2017/01/04 21:53:35]

Done.

+  // function also records UMA stats of download attribution result.
+  void AddReferrerChainToPPAPIClientDownloadRequest(
+    const GURL& initiating_frame_url,
+    content::WebContents* web_contents,
+    ClientDownloadRequest* out_request);
+
   // These pointers may be NULL if SafeBrowsing is disabled.
   scoped_refptr<SafeBrowsingUIManager> ui_manager_;
   scoped_refptr<SafeBrowsingDatabaseManager> database_manager_;