Add prefs for collapsed currently open tabs group in new tab page

chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java

Index: chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java b/chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java
index f2fdf3f759d0839540c45fd24c9117e591858bb9..21e80f8d0021bd90086f86cc4312942d01864d45 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java
@@ -31,67 +31,90 @@ public class NewTabPagePrefs {
     }
 
     /**
-     * Set snapshot document list collapsed or uncollapsed state in preferences.
-     * @param isCollapsed {@code True} Whether we want the snapshot documents list to be collapsed.
+     * Sets whether the list of currently open tabs is collapsed (vs expanded) on the Recent Tabs
+     * page.
+     * @param isCollapsed Whether we want the currently open tabs list to be collapsed.
+     */
+    public void setCurrentlyOpenTabsCollapsed(boolean isCollapsed) {
+        nativeSetCurrentlyOpenTabsCollapsed(mNativeNewTabPagePrefs, isCollapsed);
+    }
+
+    /**
+     * Gets whether the list of currently open tabs is collapsed (vs expanded) on Recent Tabs page.
+     * @return Whether the list of currently open tabs is collapsed (vs expanded) on
+     *         the Recent Tabs page.
+     */
+    public boolean getCurrentlyOpenTabsCollapsed() {
+        return nativeGetCurrentlyOpenTabsCollapsed(mNativeNewTabPagePrefs);
+    }
+
+    /**
+     * Sets whether the list of snapshot documents is collapsed (vs expanded) on the Recent Tabs
+     * page.
+     * @param isCollapsed Whether we want the snapshot documents list to be collapsed.
      */
     public void setSnapshotDocumentCollapsed(boolean isCollapsed) {
         nativeSetSnapshotDocumentCollapsed(mNativeNewTabPagePrefs, isCollapsed);
     }
 
     /**
-     * Get the snapshot document list collapsed or uncollapsed state in preferences.
-     * @return {@code True} Whether the snapshot documnets list is collapsed.
+     * Gets whether the list of snapshot documents is collapsed (vs expanded) on
+     * the Recent Tabs page.
+     * @return Whether the list of snapshot documents is collapsed (vs expanded) on
+     *         the Recent Tabs page.
      */
     public boolean getSnapshotDocumentCollapsed() {
         return nativeGetSnapshotDocumentCollapsed(mNativeNewTabPagePrefs);
     }
 
     /**
-     * Set recently closed tabs list collapsed or uncollapsed state in preferences.
-     * @param isCollapsed {@code True} Whether we want the recently closed tabs list to be
-     * collapsed.
+     * Sets whether the list of recently closed tabs is collapsed (vs expanded) on the Recent Tabs
+     * page.
+     * @param isCollapsed Whether we want the recently closed tabs list to be collapsed.
      */
     public void setRecentlyClosedTabsCollapsed(boolean isCollapsed) {
         nativeSetRecentlyClosedTabsCollapsed(mNativeNewTabPagePrefs, isCollapsed);
     }
 
     /**
-     * Get the recently closed document list collapsed or uncollapsed state in preferences.
-     * @return {@code True} Whether the recently closed list is collapsed.
+     * Gets whether the list of recently closed tabs is collapsed (vs expanded) on
+     * the Recent Tabs page.
+     * @return Whether the list of recently closed tabs is collapsed (vs expanded) on
+     *         the Recent Tabs page.
      */
     public boolean getRecentlyClosedTabsCollapsed() {
         return nativeGetRecentlyClosedTabsCollapsed(mNativeNewTabPagePrefs);
     }
 
     /**
-     * Set sync promo collapsed or uncollapsed state in preferences.
-     * @param isCollapsed {@code True} Whether we want the sync promo to be collapsed.
+     * Sets whether sync promo is collapsed (vs expanded) on the Recent Tabs page.
+     * @param isCollapsed Whether we want the sync promo to be collapsed.
      */
     public void setSyncPromoCollapsed(boolean isCollapsed) {
         nativeSetSyncPromoCollapsed(mNativeNewTabPagePrefs, isCollapsed);
     }
 
     /**
-     * Get the sync promo collapsed or uncollapsed state in preferences.
-     * @return {@code True} Whether the snapshot documnets list is collapsed.
+     * Gets whether sync promo is collapsed (vs expanded) on the Recent Tabs page.
+     * @return Whether the sync promo is collapsed (vs expanded) on the Recent Tabs page.
      */
     public boolean getSyncPromoCollapsed() {
         return nativeGetSyncPromoCollapsed(mNativeNewTabPagePrefs);
     }
 
     /**
-     * Set the given session collapsed or uncollapsed in preferences.
-     * @param session     Session to set collapsed or uncollapsed.
-     * @param isCollapsed {@code True} iff we want the session to be collapsed.
+     * Sets whether the given foreign session is collapsed (vs expanded) on the Recent Tabs page.
+     * @param session Session to set collapsed or expanded.
+     * @param isCollapsed Whether we want the foreign session to be collapsed.
      */
     public void setForeignSessionCollapsed(ForeignSession session, boolean isCollapsed) {
         nativeSetForeignSessionCollapsed(mNativeNewTabPagePrefs, session.tag, isCollapsed);
     }
 
     /**
-     * Get the given session collapsed or uncollapsed state in preferences.
+     * Gets whether the given foreign session is collapsed (vs expanded) on the Recent Tabs page.
      * @param  session Session to fetch collapsed state.
-     * @return         {@code True} if the session is collapsed, false if expanded.
+     * @return Whether the given foreign session is collapsed (vs expanded) on the Recent Tabs page.
      */
     public boolean getForeignSessionCollapsed(ForeignSession session) {
         return nativeGetForeignSessionCollapsed(mNativeNewTabPagePrefs, session.tag);
@@ -99,6 +122,10 @@ public class NewTabPagePrefs {
 
     private static native long nativeInit(Profile profile);
     private static native void nativeDestroy(long nativeNewTabPagePrefs);
+    private static native void nativeSetCurrentlyOpenTabsCollapsed(
+            long nativeNewTabPagePrefs, boolean isCollapsed);
+    private static native boolean nativeGetCurrentlyOpenTabsCollapsed(
+            long nativeNewTabPagePrefs);
     private static native void nativeSetSnapshotDocumentCollapsed(
             long nativeNewTabPagePrefs, boolean isCollapsed);
     private static native boolean nativeGetSnapshotDocumentCollapsed(