Add an API to Pause and Resume background offlining requests.

components/offline_pages/background/request_queue_unittest.cc

Index: components/offline_pages/background/request_queue_unittest.cc
diff --git a/components/offline_pages/background/request_queue_unittest.cc b/components/offline_pages/background/request_queue_unittest.cc
index 700172ad0bb2b2c2fef8ef45ed688c818d85bcf5..079513ea7209963ef405e8d0eb8f6f821dfc2b7f 100644
--- a/components/offline_pages/background/request_queue_unittest.cc
+++ b/components/offline_pages/background/request_queue_unittest.cc
@@ -213,10 +213,65 @@ TEST_F(RequestQueueTest, RemoveSeveralRequests) {
   queue()->GetRequests(
       base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
   PumpLoop();
+
+  // Verify both requests are no longer in the queue.
   ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
   ASSERT_EQ(0ul, last_requests().size());
 }
 
+TEST_F(RequestQueueTest, PauseAndResume) {
+  base::Time creation_time = base::Time::Now();
+  SavePageRequest request(kRequestId, kUrl, kClientId, creation_time,
+                          kUserRequested);
+  queue()->AddRequest(request, base::Bind(&RequestQueueTest::AddRequestDone,
+                                          base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(kRequestId, last_added_request()->request_id());
+
+  queue()->GetRequests(
+      base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
+  ASSERT_EQ(1ul, last_requests().size());
+
+  std::vector<int64_t> request_ids;
+  request_ids.push_back(kRequestId);
+
+  // Pause the request.
+  queue()->ChangeRequestsState(
+      request_ids, SavePageRequest::RequestState::PAUSED,
+      base::Bind(&RequestQueueTest::UpdateRequestDone, base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(UpdateRequestResult::SUCCESS, last_update_result());
+
+  queue()->GetRequests(
+      base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
+  PumpLoop();
+
+  // Verify the request is paused.
+  ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
+  ASSERT_EQ(1ul, last_requests().size());
+  ASSERT_EQ(SavePageRequest::RequestState::PAUSED,
+            last_requests().front().request_state());
+
+  // Resume the request.
+  queue()->ChangeRequestsState(
+      request_ids, SavePageRequest::RequestState::AVAILABLE,
+      base::Bind(&RequestQueueTest::UpdateRequestDone, base::Unretained(this)));
+  PumpLoop();
+  ASSERT_EQ(UpdateRequestResult::SUCCESS, last_update_result());
+
+  queue()->GetRequests(
+      base::Bind(&RequestQueueTest::GetRequestsDone, base::Unretained(this)));
+  PumpLoop();
+
+  // Verify the request is no longer paused.
+  ASSERT_EQ(GetRequestsResult::SUCCESS, last_get_requests_result());
+  ASSERT_EQ(1ul, last_requests().size());
+  ASSERT_EQ(SavePageRequest::RequestState::AVAILABLE,
+            last_requests().front().request_state());
+}
+
 // A longer test populating the request queue with more than one item, properly
 // listing multiple items and removing the right item.
 TEST_F(RequestQueueTest, MultipleRequestsAddGetRemove) {