Move download stuff to download tab helper.

content/browser/tab_contents/tab_contents.cc

Index: content/browser/tab_contents/tab_contents.cc
diff --git a/content/browser/tab_contents/tab_contents.cc b/content/browser/tab_contents/tab_contents.cc
index d51e63e9661413b0bb8fabf0d66afe22bca678c6..b4aee7c962069e04e147b0f2dde59dcc90f04a92 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -13,11 +13,9 @@
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
-#include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/debugger/devtools_manager.h"
 #include "chrome/browser/defaults.h"
-#include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/external_protocol_handler.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/load_from_memory_cache_details.h"
@@ -856,26 +854,6 @@ bool TabContents::ShouldShowBookmarkBar() {
       false : render_manager_.web_ui()->force_bookmark_bar_visible();
 }
 
-bool TabContents::CanDownload(int request_id) {
-  TabContentsDelegate* d = delegate();
-  if (d)
-    return d->CanDownload(request_id);
-  return true;
-}
-
-void TabContents::OnStartDownload(DownloadItem* download) {
-  DCHECK(download);
-
-  if (!delegate())
-    return;
-
-  // Download in a constrained popup is shown in the tab that opened it.
-  TabContents* tab_contents = delegate()->GetConstrainingContents(this);
-
-  if (tab_contents && tab_contents->delegate())
-    tab_contents->delegate()->OnStartDownload(download, this);
-}
-
 void TabContents::WillClose(ConstrainedWindow* window) {
   ConstrainedWindowList::iterator i(
       std::find(child_windows_.begin(), child_windows_.end(), window));
@@ -1954,11 +1932,8 @@ WebPreferences TabContents::GetWebkitPrefs() {
 }
 
 void TabContents::OnUserGesture() {
-  // See comment in RenderViewHostDelegate::OnUserGesture as to why we do this.
-  DownloadRequestLimiter* limiter =
-      g_browser_process->download_request_limiter();
-  if (limiter)
-    limiter->OnUserGesture(this);
+  // Notify observers.
+  FOR_EACH_OBSERVER(TabContentsObserver, observers_, DidGetUserGesture());
   ExternalProtocolHandler::PermitLaunchUrl();
 }