downloads: break downloads.js into more classes/files.

chrome/browser/resources/downloads/compiled_resources.gyp

Index: chrome/browser/resources/downloads/compiled_resources.gyp
diff --git a/chrome/browser/resources/downloads/compiled_resources.gyp b/chrome/browser/resources/downloads/compiled_resources.gyp
index 56f946a695a20516c04dbdf0d10996fadee42647..c6c8b08a8c2ac03fbfe69e3b6efb4dc17d50f30f 100644
--- a/chrome/browser/resources/downloads/compiled_resources.gyp
+++ b/chrome/browser/resources/downloads/compiled_resources.gyp
@@ -4,7 +4,7 @@
 {
   'targets': [
     {
-      'target_name': 'downloads',
+      'target_name': 'manager',
       'variables': {
         'depends': [
           '../../../../ui/webui/resources/js/action_link.js',
@@ -17,8 +17,14 @@
           '../../../../ui/webui/resources/js/cr/ui/focus_row.js',
           '../../../../ui/webui/resources/js/event_tracker.js',
           '../../../../ui/webui/resources/js/util.js',
+          'item.js',
+          'item_view.js',
+          'focus_row.js',
+        ],
+        'externs': [
+          '<(CLOSURE_DIR)/externs/chrome_send_externs.js',
+          'externs.js',
         ],
-        'externs': ['<(CLOSURE_DIR)/externs/chrome_send_externs.js'],
       },
       'includes': ['../../../../third_party/closure_compiler/compile_js.gypi'],
     }