Use DeleteSoon to delete BundledExchangesBlobDataSource's Core

Bug: 1018640
Change-Id: Ifeed5db772abface2d6ed9a6b12c3f6e0a8481e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893127Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711653}

content/browser/web_package/bundled_exchanges_blob_data_source.cc

@@ -119,7 +119,8 @@ BundledExchangesBlobDataSource::BundledExchangesBlobDataSource(
 
 BundledExchangesBlobDataSource::~BundledExchangesBlobDataSource() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DeleteCore(std::move(core_));
+  if (core_)
+    base::DeleteSoon(FROM_HERE, {BrowserThread::IO}, std::move(core_));
 
   auto tasks = std::move(pending_get_core_tasks_);
   for (auto& task : tasks) {
@@ -157,23 +158,12 @@ void BundledExchangesBlobDataSource::SetCoreOnUI(
   if (!weak_ptr) {
     // This happens when the BundledExchangesBlobDataSource was deleted before
     // SetCoreOnUI() is called.
-    DeleteCore(std::move(core));
+    base::DeleteSoon(FROM_HERE, {BrowserThread::IO}, std::move(core));
     return;
   }
   weak_ptr->SetCoreOnUIImpl(std::move(weak_core), std::move(core));
 }
 
-// static
-void BundledExchangesBlobDataSource::DeleteCore(
-    std::unique_ptr<BlobDataSourceCore> core) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  if (!core)
-    return;
-  base::PostTask(FROM_HERE, {BrowserThread::IO},
-                 base::BindOnce([](std::unique_ptr<BlobDataSourceCore> core) {},
-                                std::move(core)));
-}
-
 void BundledExchangesBlobDataSource::ReadToDataPipe(
     uint64_t offset,
     uint64_t length,

content/browser/web_package/bundled_exchanges_blob_data_source.h

@@ -116,8 +116,6 @@ class CONTENT_EXPORT BundledExchangesBlobDataSource {
       base::WeakPtr<BlobDataSourceCore> weak_core,
       std::unique_ptr<BlobDataSourceCore> core);
 
-  static void DeleteCore(std::unique_ptr<BlobDataSourceCore> core);
-
   void WaitForCore(base::OnceClosure callback);
 
   void ReadToDataPipeImpl(uint64_t offset,