Make the UI an observer of downloads.

chrome/browser/download/chrome_download_manager_delegate.cc

Index: chrome/browser/download/chrome_download_manager_delegate.cc
diff --git a/chrome/browser/download/chrome_download_manager_delegate.cc b/chrome/browser/download/chrome_download_manager_delegate.cc
index f22aa6f303413f17f1dccb3e5b6fcab9c93335fb..a0f863aba4815205177678461f4caf5d79a00bc9 100644
--- a/chrome/browser/download/chrome_download_manager_delegate.cc
+++ b/chrome/browser/download/chrome_download_manager_delegate.cc
@@ -39,7 +39,6 @@
 #include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
-#include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -55,11 +54,6 @@
 #include "net/base/net_util.h"
 #include "ui/base/l10n/l10n_util.h"
 
-#if !defined(OS_ANDROID)
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_finder.h"
-#endif
-
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/drive/drive_download_handler.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_util.h"
@@ -262,22 +256,6 @@ void ChromeDownloadManagerDelegate::ChooseDownloadPath(
                     file_selected_callback);
 }
 
-WebContents* ChromeDownloadManagerDelegate::
-    GetAlternativeWebContentsToNotifyForDownload() {
-#if defined(OS_ANDROID)
-  // Android does not implement BrowserList or any other way to get an
-  // alternate web contents.
-  return NULL;
-#else
-  // Start the download in the last active browser. This is not ideal but better
-  // than fully hiding the download from the user.
-  Browser* last_active = chrome::FindLastActiveWithProfile(profile_,
-      chrome::GetActiveDesktop());
-  return last_active ? last_active->tab_strip_model()->GetActiveWebContents()
-                     : NULL;
-#endif
-}
-
 bool ChromeDownloadManagerDelegate::ShouldOpenFileBasedOnExtension(
     const base::FilePath& path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));