Move download stuff from download helper back to TabContents. This is basically a revert of r8576...

content/browser/tab_contents/tab_contents.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/tab_contents/tab_contents.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/stats_counters.h"
 #include "base/string16.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/content_browser_client.h"
 #include "content/browser/debugger/devtools_manager.h"
 #include "content/browser/host_zoom_map.h"
 #include "content/browser/in_process_webkit/session_storage_namespace.h"
 #include "content/browser/load_from_memory_cache_details.h"
 #include "content/browser/load_notification_details.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
+#include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/browser/renderer_host/resource_request_details.h"
 #include "content/browser/site_instance.h"
 #include "content/browser/tab_contents/interstitial_page.h"
 #include "content/browser/tab_contents/navigation_details.h"
 #include "content/browser/tab_contents/navigation_entry.h"
 #include "content/browser/tab_contents/provisional_load_details.h"
 #include "content/browser/tab_contents/tab_contents_delegate.h"
 #include "content/browser/tab_contents/tab_contents_observer.h"
 #include "content/browser/tab_contents/tab_contents_view.h"
 #include "content/browser/tab_contents/title_updated_details.h"
@@ skipping 635 matching lines @@
   if (entry && entry->url() == GURL(chrome::kAboutBlankURL))
     return true;
   return false;
 }
 
 void TabContents::SetFocusToLocationBar(bool select_all) {
   if (delegate())
     delegate()->SetFocusToLocationBar(select_all);
 }
 
+bool TabContents::CanDownload(int request_id) {
+  TabContentsDelegate* d = delegate();
+  if (d)
+    return d->CanDownload(this, request_id);
+  return true;
+}
+
+void TabContents::OnStartDownload(DownloadItem* download) {
+  TabContentsDelegate* d = delegate();
+  if (d)
+    d->OnStartDownload(this, download);
+}
+
 void TabContents::WillClose(ConstrainedWindow* window) {
   ConstrainedWindowList::iterator i(
       std::find(child_windows_.begin(), child_windows_.end(), window));
   bool removed_topmost_window = i == child_windows_.begin();
   if (i != child_windows_.end())
     child_windows_.erase(i);
   if (child_windows_.empty()) {
     BlockTabContent(false);
   } else {
     if (removed_topmost_window)
@@ skipping 944 matching lines @@
   if (!IOSurfaceSupport::Initialize())
       web_prefs.accelerated_compositing_enabled = false;
 #endif
 
   return web_prefs;
 }
 
 void TabContents::OnUserGesture() {
   // Notify observers.
   FOR_EACH_OBSERVER(TabContentsObserver, observers_, DidGetUserGesture());
+
+  ResourceDispatcherHost* rdh =
+      content::GetContentClient()->browser()->GetResourceDispatcherHost();
+  if (rdh)  // NULL in unittests.
+    rdh->download_request_limiter()->OnUserGesture(this);
 }
 
 void TabContents::OnIgnoredUIEvent() {
   if (constrained_window_count()) {
     ConstrainedWindow* window = *constrained_window_begin();
     window->FocusConstrainedWindow();
   }
 }
 
 void TabContents::OnCrossSiteResponse(int new_render_process_host_id,
@@ skipping 157 matching lines @@
 }
 
 void TabContents::SwapInRenderViewHost(RenderViewHost* rvh) {
   render_manager_.SwapInRenderViewHost(rvh);
 }
 
 void TabContents::CreateViewAndSetSizeForRVH(RenderViewHost* rvh) {
   RenderWidgetHostView* rwh_view = view()->CreateViewForWidget(rvh);
   rwh_view->SetSize(view()->GetContainerSize());
 }