Remove unused include in sequenced_worker_pool.h

storage/browser/blob/blob_data_handle.cc

Index: storage/browser/blob/blob_data_handle.cc
diff --git a/storage/browser/blob/blob_data_handle.cc b/storage/browser/blob/blob_data_handle.cc
index 55e63a1b620697add3368bf82cd0537387de0eb5..a2165ad1edb0133a28cfcb2ad617ea8585fb8a10 100644
--- a/storage/browser/blob/blob_data_handle.cc
+++ b/storage/browser/blob/blob_data_handle.cc
@@ -103,10 +103,7 @@ BlobDataHandle::BlobDataHandle(const std::string& uuid,
   DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
 }
 
-BlobDataHandle::BlobDataHandle(const BlobDataHandle& other) {
-  io_task_runner_ = other.io_task_runner_;
-  shared_ = other.shared_;
-}
+BlobDataHandle::BlobDataHandle(const BlobDataHandle& other) = default;
 
 BlobDataHandle::~BlobDataHandle() {
   if (!io_task_runner_->RunsTasksOnCurrentThread()) {
@@ -117,6 +114,9 @@ BlobDataHandle::~BlobDataHandle() {
   }
 }
 
+BlobDataHandle& BlobDataHandle::operator=(
+    const BlobDataHandle& other) = default;
+
 bool BlobDataHandle::IsBeingBuilt() const {
   DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
   if (!shared_->context_)