[Offline Pages] Handle prerender FinalStatus UnsupportedScheme as a cancel rather than failure.

chrome/browser/android/offline_pages/prerendering_loader_unittest.cc

Index: chrome/browser/android/offline_pages/prerendering_loader_unittest.cc
diff --git a/chrome/browser/android/offline_pages/prerendering_loader_unittest.cc b/chrome/browser/android/offline_pages/prerendering_loader_unittest.cc
index f662f12306903d6d9095d19b77ba942f732af2f0..d90a2183d2761736a9c9077d156c746bc5e5156b 100644
--- a/chrome/browser/android/offline_pages/prerendering_loader_unittest.cc
+++ b/chrome/browser/android/offline_pages/prerendering_loader_unittest.cc
@@ -147,6 +147,7 @@ void PrerenderingLoaderTest::SetUp() {
   loader_.reset(new PrerenderingLoader(&profile_));
   test_adapter_ = new TestAdapter(loader_.get());
   loader_->SetAdapterForTesting(base::WrapUnique(test_adapter_));
+  callback_called_ = false;
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 }
 
@@ -252,6 +253,32 @@ TEST_F(PrerenderingLoaderTest, LoadPageLoadFailedNoContent) {
   PumpLoop();
 }
 
+TEST_F(PrerenderingLoaderTest, LoadPageLoadFailedUnsupportedScheme) {
+  test_adapter()->Configure(
+      nullptr /* web_contents */,
+      prerender::FinalStatus::FINAL_STATUS_UNSUPPORTED_SCHEME);
+  GURL gurl("http://testit.sea");
+  EXPECT_TRUE(loader()->IsIdle());
+  EXPECT_TRUE(loader()->LoadPage(
+      gurl,
+      base::Bind(&PrerenderingLoaderTest::OnLoadDone, base::Unretained(this))));
+  EXPECT_FALSE(loader()->IsIdle());
+  EXPECT_FALSE(loader()->IsLoaded());
+
+  test_adapter()->GetObserver()->OnPrerenderDomContentLoaded();
+  PumpLoop();
+  EXPECT_TRUE(loader()->IsIdle());
+  EXPECT_TRUE(callback_called());
+  // Unsupported Scheme final status currently considered a cancel rather
+  // than failure in case it is due to lost network connectivity.
+  EXPECT_EQ(Offliner::RequestStatus::PRERENDERING_CANCELED,
+            callback_load_status());
+
+  // Stopped event causes no harm.
+  test_adapter()->GetObserver()->OnPrerenderStop();
+  PumpLoop();
+}
+
 TEST_F(PrerenderingLoaderTest, LoadPageLoadCanceledFromStopLoading) {
   GURL gurl("http://testit.sea");
   EXPECT_TRUE(loader()->IsIdle());