Create new helper method to openFolder in Bookmark*Tests

Some clean-up from nits in http://crrev.com/c/1929262.

BUG=1018170

Change-Id: Ib062e2ed3f512d3d3789099424534412519f5025
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1934449Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718798}

chrome/android/javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkReorderTest.java

@@ -812,9 +812,7 @@ public class BookmarkReorderTest extends BookmarkTest {
         openBookmarkManager();
 
         // Open the new folder where these bookmarks were created.
-        final BookmarkDelegate delegate = getBookmarkManager();
-        TestThreadUtils.runOnUiThreadBlocking(() -> delegate.openFolder(folder));
-        RecyclerViewTestUtils.waitForStableRecyclerView(mItemsContainer);
+        openFolder(folder);
 
         Assert.assertEquals(1, getAdapter().getItemCount());
         BookmarkRow row =
@@ -855,9 +853,7 @@ public class BookmarkReorderTest extends BookmarkTest {
         openBookmarkManager();
 
         // Open the new folder where these bookmarks were created.
-        final BookmarkDelegate delegate = getBookmarkManager();
-        TestThreadUtils.runOnUiThreadBlocking(() -> delegate.openFolder(folder));
-        RecyclerViewTestUtils.waitForStableRecyclerView(mItemsContainer);
+        openFolder(folder);
 
         Assert.assertEquals(3, getAdapter().getItemCount());
         BookmarkRow row =
@@ -892,9 +888,7 @@ public class BookmarkReorderTest extends BookmarkTest {
         openBookmarkManager();
 
         // Open the new folder where these bookmarks were created.
-        final BookmarkDelegate delegate = getBookmarkManager();
-        TestThreadUtils.runOnUiThreadBlocking(() -> delegate.openFolder(folder));
-        RecyclerViewTestUtils.waitForStableRecyclerView(mItemsContainer);
+        openFolder(folder);
 
         Assert.assertEquals(3, getAdapter().getItemCount());
         BookmarkRow row =
@@ -929,9 +923,7 @@ public class BookmarkReorderTest extends BookmarkTest {
         openBookmarkManager();
 
         // Open the new folder where these bookmarks were created.
-        final BookmarkDelegate delegate = getBookmarkManager();
-        TestThreadUtils.runOnUiThreadBlocking(() -> delegate.openFolder(folder));
-        RecyclerViewTestUtils.waitForStableRecyclerView(mItemsContainer);
+        openFolder(folder);
 
         Assert.assertEquals(1, getAdapter().getItemCount());
         BookmarkRow row =

chrome/android/javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkTest.java

@@ -337,7 +337,7 @@ public class BookmarkTest {
         final BookmarkDelegate delegate = getBookmarkManager();
 
         // Open the new folder where these bookmarks were created.
-        TestThreadUtils.runOnUiThreadBlocking(() -> delegate.openFolder(folder));
+        openFolder(folder);
 
         Assert.assertEquals(BookmarkUIState.STATE_FOLDER, delegate.getCurrentState());
         Assert.assertEquals(
@@ -387,7 +387,7 @@ public class BookmarkTest {
         BookmarkManager manager = getBookmarkManager();
 
         // Open the new folder where these bookmarks were created.
-        TestThreadUtils.runOnUiThreadBlocking(() -> manager.openFolder(testFolder));
+        openFolder(testFolder);
 
         Assert.assertEquals("Wrong state, should be in folder", BookmarkUIState.STATE_FOLDER,
                 manager.getCurrentState());
@@ -594,4 +594,10 @@ public class BookmarkTest {
     protected void searchBookmarks(final String query) {
         TestThreadUtils.runOnUiThreadBlocking(() -> getBookmarkItemsAdapter().search(query));
     }
+
+    protected void openFolder(BookmarkId folder) {
+        final BookmarkDelegate delegate = getBookmarkManager();
+        TestThreadUtils.runOnUiThreadBlocking(() -> delegate.openFolder(folder));
+        RecyclerViewTestUtils.waitForStableRecyclerView(mItemsContainer);
+    }
 }