[Bookmarks] Remove side drawer and introduce root folder view

chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkDelegate.java
index 3813d11ce0baae9913c6ceeb4fc12fb588999b89..3eb632b547b7c3587d65c57567366b56fb87940f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkDelegate.java
@@ -4,8 +4,6 @@
 
 package org.chromium.chrome.browser.bookmarks;
 
-import android.support.v4.widget.DrawerLayout;
-
 import org.chromium.chrome.browser.favicon.LargeIconBridge;
 import org.chromium.chrome.browser.widget.selection.SelectionDelegate;
 import org.chromium.components.bookmarks.BookmarkId;
@@ -35,8 +33,7 @@ interface BookmarkDelegate {
     boolean isDialogUi();
 
     /**
-     * Corresponds to any folder named list item in the side drawer. Shows bookmarks under the
-     * folder.
+     * Shows bookmarks contained in the specified folder.
      * @param folder Parent folder that contains bookmarks to show as its children.
      */
     void openFolder(BookmarkId folder);
@@ -53,21 +50,6 @@ interface BookmarkDelegate {
     void notifyStateChange(BookmarkUIObserver observer);
 
     /**
-     * @return Whether there is a drawer.
-     */
-    boolean doesDrawerExist();
-
-    /**
-     * Close drawer if it's visible.
-     */
-    void closeDrawer();
-
-    /**
-     * @return The current drawer layout instance, if it exists.
-     */
-    DrawerLayout getDrawerLayout();
-
-    /**
      * Closes the Bookmark UI (if on phone) and opens the given bookmark.
      * @param bookmark       bookmark to open.
      * @param launchLocation The UI location where user tried to open bookmark. It is one of