Ntp: restore scroll position.

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
index fddc26ea35d472a32a9440fef3e929389722851d..756998858c259489bd6b2907505c1bb8cb7ff9ca 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
@@ -296,7 +296,7 @@ public class NewTabPageView extends FrameLayout
      * @param snippetsBridge The optional bridge, that can be used to interact with the snippets.
      */
     public void initialize(NewTabPageManager manager, boolean searchProviderHasLogo,
-            SnippetsBridge snippetsBridge) {
+            SnippetsBridge snippetsBridge, int scrollPosition) {
         mManager = manager;
         mUiConfig = new UiConfig(this);
         ViewStub stub = (ViewStub) findViewById(R.id.new_tab_page_layout_stub);
@@ -352,6 +352,7 @@ public class NewTabPageView extends FrameLayout
             mNewTabPageAdapter =
                     new NewTabPageAdapter(mManager, mNewTabPageLayout, snippetsBridge, mUiConfig);
             mRecyclerView.setAdapter(mNewTabPageAdapter);
+            mRecyclerView.scrollToPosition(scrollPosition);
 
             // Set up swipe-to-dismiss
             ItemTouchHelper helper =
@@ -1178,4 +1179,8 @@ public class NewTabPageView extends FrameLayout
             return mScrollView.getScrollY();
         }
     }
+
+    public int getScrollPosition() {

[Ted C, 2016/09/19 19:59:08]

javadoc (probably worth noting that it does not necessarily reflect the internal
scroll Y position but just a scroll value that allows this to return to a close
approximation of the previous state)

[Michael van Ouwerkerk, 2016/09/20 11:08:16]

Done.

+        return mRecyclerView.getScrollPosition();
+    }
 }