Support restricting browsing data removal for downloads by origin.

content/browser/browser_context.cc

 // Copyright (c) 2012 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/public/browser/browser_context.h"
 
 #if !defined(OS_IOS)
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/fileapi/chrome_blob_storage_context.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
@@ skipping 73 matching lines @@
   indexed_db_context->SetForceKeepSessionState();
 }
 
 void ShutdownServiceWorkerContext(StoragePartition* partition) {
   ServiceWorkerContextWrapper* wrapper =
       static_cast<ServiceWorkerContextWrapper*>(
           partition->GetServiceWorkerContext());
   wrapper->process_manager()->Shutdown();
 }
 
+void SetDownloadManager(BrowserContext* context,
+                        content::DownloadManager* download_manager) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(context);

[Charlie Reis, 2015/08/05 22:19:19]

This one seems optional, since we'll crash on line 99 anyway if it's null.  I'm
ok if you want to keep it as documentation.

[Timo Reimann, 2015/08/06 01:13:45]

I'm fine with removing it. Done.

+  DCHECK(download_manager);
+  context->SetUserData(kDownloadManagerKeyName, download_manager);
+}
+
 }  // namespace
 
 // static
 void BrowserContext::AsyncObliterateStoragePartition(
     BrowserContext* browser_context,
     const GURL& site,
     const base::Closure& on_gc_required) {
   GetStoragePartitionMap(browser_context)->AsyncObliterate(site,
                                                            on_gc_required);
 }
@@ skipping 10 matching lines @@
 DownloadManager* BrowserContext::GetDownloadManager(
     BrowserContext* context) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (!context->GetUserData(kDownloadManagerKeyName)) {
     ResourceDispatcherHostImpl* rdh = ResourceDispatcherHostImpl::Get();
     DCHECK(rdh);
     DownloadManager* download_manager =
         new DownloadManagerImpl(
             GetContentClient()->browser()->GetNetLog(), context);
 
-    context->SetUserData(
-        kDownloadManagerKeyName,
-        download_manager);
+    SetDownloadManager(context, download_manager);
     download_manager->SetDelegate(context->GetDownloadManagerDelegate());
   }
 
   return static_cast<DownloadManager*>(
       context->GetUserData(kDownloadManagerKeyName));
 }
 
 // static
 storage::ExternalMountPoints* BrowserContext::GetMountPoints(
     BrowserContext* context) {
@@ skipping 163 matching lines @@
         storage_partition->GetIndexedDBContext());
   // No task runner in unit tests.
   if (indexed_db_context_impl->TaskRunner()) {
     indexed_db_context_impl->TaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&SaveSessionStateOnIndexedDBThread,
                    make_scoped_refptr(indexed_db_context_impl)));
   }
 }
 
+void BrowserContext::SetDownloadManagerForTesting(
+    BrowserContext* browser_context,
+    DownloadManager* download_manager) {
+  SetDownloadManager(browser_context, download_manager);
+}
+
 #endif  // !OS_IOS
 
 BrowserContext::~BrowserContext() {
 #if !defined(OS_IOS)
   if (GetUserData(kDownloadManagerKeyName))
     GetDownloadManager(this)->Shutdown();
 #endif
 }
 
 }  // namespace content