Add "Show saved copy" button in dino page when there's offline copy

components/offline_pages/offline_page_model_unittest.cc

Index: components/offline_pages/offline_page_model_unittest.cc
diff --git a/components/offline_pages/offline_page_model_unittest.cc b/components/offline_pages/offline_page_model_unittest.cc
index 2da4fd07b3a93630d4b851b3d9ec980c76d771bb..b778c49af7b1825de3ed0213598149f20a1f2c67 100644
--- a/components/offline_pages/offline_page_model_unittest.cc
+++ b/components/offline_pages/offline_page_model_unittest.cc
@@ -388,10 +388,12 @@ TEST_F(OfflinePageModelTest, SavePageSuccessful) {
       BuildArchiver(kTestUrl,
                     OfflinePageArchiver::ArchiverResult::SUCCESSFULLY_CREATED)
           .Pass());
+  EXPECT_FALSE(model()->HasOfflinePages());
   model()->SavePage(
       kTestUrl, kTestPageBookmarkId1, archiver.Pass(),
       base::Bind(&OfflinePageModelTest::OnSavePageDone, AsWeakPtr()));
   PumpLoop();
+  EXPECT_TRUE(model()->HasOfflinePages());
 
   OfflinePageTestStore* store = GetStore();
   EXPECT_EQ(kTestUrl, store->last_saved_page().url);
@@ -841,6 +843,39 @@ TEST_F(OfflinePageModelTest, GetPageByOfflineURL) {
   EXPECT_FALSE(page);
 }
 
+TEST_F(OfflinePageModelTest, GetPageByOnlineURL) {
+  scoped_ptr<OfflinePageTestArchiver> archiver(
+      BuildArchiver(kTestUrl,
+                    OfflinePageArchiver::ArchiverResult::SUCCESSFULLY_CREATED)
+          .Pass());
+  model()->SavePage(
+      kTestUrl, kTestPageBookmarkId1, archiver.Pass(),
+      base::Bind(&OfflinePageModelTest::OnSavePageDone, AsWeakPtr()));
+  PumpLoop();
+
+  scoped_ptr<OfflinePageTestArchiver> archiver2(
+      BuildArchiver(kTestUrl2,
+                    OfflinePageArchiver::ArchiverResult::SUCCESSFULLY_CREATED)
+          .Pass());
+  model()->SavePage(
+      kTestUrl2, kTestPageBookmarkId2, archiver2.Pass(),
+      base::Bind(&OfflinePageModelTest::OnSavePageDone, AsWeakPtr()));
+  PumpLoop();
+
+  const OfflinePageItem* page = model()->GetPageByOnlineURL(kTestUrl2);
+  EXPECT_TRUE(page);
+  EXPECT_EQ(kTestUrl2, page->url);
+  EXPECT_EQ(kTestPageBookmarkId2, page->bookmark_id);
+
+  page = model()->GetPageByOnlineURL(kTestUrl);
+  EXPECT_TRUE(page);
+  EXPECT_EQ(kTestUrl, page->url);
+  EXPECT_EQ(kTestPageBookmarkId1, page->bookmark_id);
+
+  page = model()->GetPageByOnlineURL(GURL("http://foo"));
+  EXPECT_FALSE(page);
+}
+
 // Test that model returns pages that are older than 30 days as candidates for
 // clean up, hence the numbers in time delta.
 TEST_F(OfflinePageModelTest, GetPagesToCleanUp) {