PrerenderingOffliner will abort background load if it sees chrome transitioning to foreground on lo…

chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc

Index: chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc
diff --git a/chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc b/chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc
index f2a4b7853c6d3e1cf24083e720e94cb873d81ade..ca9f1586bef25aea31bcca6cc70664e2967834e3 100644
--- a/chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc
+++ b/chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc
@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/run_loop.h"
+#include "base/sys_info.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/android/offline_pages/prerendering_loader.h"
 #include "chrome/test/base/testing_profile.h"
@@ -328,4 +329,35 @@ TEST_F(PrerenderingOfflinerTest, LoadAndSaveLoadedButThenCanceledFromLoader) {
   EXPECT_TRUE(SaveInProgress());
 }
 
+TEST_F(PrerenderingOfflinerTest, ForegroundTransitionCancelsOnLowEndDevice) {
+  offliner()->SetLowEndDeviceForTesting(true);
+
+  base::Time creation_time = base::Time::Now();
+  SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time);
+  EXPECT_TRUE(offliner()->LoadAndSave(request, callback()));
+  EXPECT_FALSE(loader()->IsIdle());
+
+  offliner()->SetApplicationStateForTesting(
+      base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
+
+  // Loading canceled on low-end device.
+  EXPECT_TRUE(loader()->IsIdle());
+  EXPECT_EQ(Offliner::RequestStatus::FOREGROUND_CANCELED, request_status());
+}
+
+TEST_F(PrerenderingOfflinerTest, ForegroundTransitionIgnoredOnHighEndDevice) {
+  offliner()->SetLowEndDeviceForTesting(false);
+
+  base::Time creation_time = base::Time::Now();
+  SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time);
+  EXPECT_TRUE(offliner()->LoadAndSave(request, callback()));
+  EXPECT_FALSE(loader()->IsIdle());
+
+  offliner()->SetApplicationStateForTesting(
+      base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
+
+  // Loader still loading since not low-end device.
+  EXPECT_FALSE(loader()->IsIdle());
+}
+
 }  // namespace offline_pages