Expose final download URL (actual url after redirects) in the extension API.

chrome/common/extensions/api/downloads.idl

Index: chrome/common/extensions/api/downloads.idl
diff --git a/chrome/common/extensions/api/downloads.idl b/chrome/common/extensions/api/downloads.idl
index 95802fc58f8dd848432af247b7d141f3e66570f2..6e8c211084e0371a8b1a8fa9da09283f657ce232 100644
--- a/chrome/common/extensions/api/downloads.idl
+++ b/chrome/common/extensions/api/downloads.idl
@@ -133,9 +133,14 @@ namespace downloads {
     long id;
 
     // Absolute URL.
+    // URL that this download started from (before any redirects).
     DOMString url;
 
     // Absolute URL.
+    // Actual download URL (final url in chain after all redirects).
+    DOMString finalUrl;
+
+    // Absolute URL.
     DOMString referrer;
 
     // Absolute local path.
@@ -261,6 +266,10 @@ namespace downloads {
     // <code>url</code> matches the given regular expression.
     DOMString? urlRegex;
 
+    // Limits results to $(ref:DownloadItem) whose
+    // <code>finalUrl</code> matches the given regular expression.
+    DOMString? finalUrlRegex;
+
     // The maximum number of matching $(ref:DownloadItem) returned. Defaults to
     // 1000. Set to 0 in order to return all matching $(ref:DownloadItem). See
     // $(ref:search) for how to page through results.
@@ -277,8 +286,13 @@ namespace downloads {
     long? id;
 
     // Absolute URL.
+    // URL that this download started from (before any redirects).
     DOMString? url;
 
+    // Absolute URL.
+    // Actual download URL (final url in chain after all redirects).
+    DOMString? finalUrl;
+
     // Absolute local path.
     DOMString? filename;
 
@@ -344,6 +358,9 @@ namespace downloads {
     // The change in <code>url</code>, if any.
     StringDelta? url;
 
+    // The change in <code>finalUrl</code>, if any.
+    StringDelta? finalUrl;
+
     // The change in <code>filename</code>, if any.
     StringDelta? filename;