Assign per-frame TaskRunner to IPCs of Quota API

The result of Quota API is handled on the default TaskRunner, though
it should use per-frame one for finer priority control.

Bug: 961186
Change-Id: I6fb1ba2912ee8d3eb79802dd6f3933210b9058e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1631262Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664653}

third_party/blink/renderer/modules/quota/storage_manager.cc

@@ -151,8 +151,10 @@ ScriptPromise StorageManager::estimate(ScriptState* script_state) {
 PermissionService& StorageManager::GetPermissionService(
     ExecutionContext* execution_context) {
   if (!permission_service_) {
-    ConnectToPermissionService(execution_context,
-                               mojo::MakeRequest(&permission_service_));
+    ConnectToPermissionService(
+        execution_context, mojo::MakeRequest(&permission_service_,
+                                             execution_context->GetTaskRunner(
+                                                 TaskType::kMiscPlatformAPI)));
     permission_service_.set_connection_error_handler(
         WTF::Bind(&StorageManager::PermissionServiceConnectionError,
                   WrapWeakPersistent(this)));
@@ -175,8 +177,10 @@ void StorageManager::PermissionRequestComplete(ScriptPromiseResolver* resolver,
 mojom::blink::QuotaDispatcherHost& StorageManager::GetQuotaHost(
     ExecutionContext* execution_context) {
   if (!quota_host_) {
-    ConnectToQuotaDispatcherHost(execution_context,
-                                 mojo::MakeRequest(&quota_host_));
+    ConnectToQuotaDispatcherHost(
+        execution_context,
+        mojo::MakeRequest(&quota_host_, execution_context->GetTaskRunner(
+                                            TaskType::kMiscPlatformAPI)));
   }
   return *quota_host_;
 }