[Home] Add some NTP UI polish

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ActivityManager;
@@ skipping 571 matching lines @@
     @Override
     public void onStart() {
         super.onStart();
         StartupMetrics.getInstance().updateIntent(getIntent());
     }
 
     @Override
     public void onStartWithNative() {
         super.onStartWithNative();
         // If we don't have a current tab, show the overview mode.
-        if (getActivityTab() == null) mLayoutManager.showOverview(false);
+        if (getActivityTab() == null && !mLayoutManager.overviewVisible()) {
+            mLayoutManager.showOverview(false);
+        }
 
         resetSavedInstanceState();
     }
 
     @Override
     public void onNewIntentWithNative(Intent intent) {
         try {
             TraceEvent.begin("ChromeTabbedActivity.onNewIntentWithNative");
 
             super.onNewIntentWithNative(intent);
@@ skipping 42 matching lines @@
 
     private void initializeUI() {
         try {
             TraceEvent.begin("ChromeTabbedActivity.initializeUI");
 
             CompositorViewHolder compositorViewHolder = getCompositorViewHolder();
             if (DeviceFormFactor.isTablet()) {
                 mLayoutManager = new LayoutManagerChromeTablet(compositorViewHolder);
             } else {
                 mLayoutManager = new LayoutManagerChromePhone(compositorViewHolder);
+                if (getBottomSheet() != null) {
+                    ((LayoutManagerChromePhone) mLayoutManager)
+                            .setForegroundTabAnimationDisabled(true);
+                }
             }
             mLayoutManager.setEnableAnimations(DeviceClassManager.enableAnimations());
             mLayoutManager.addOverviewModeObserver(this);
 
             if (getBottomSheet() != null) getBottomSheet().setLayoutManagerChrome(mLayoutManager);
 
             // TODO(yusufo): get rid of findViewById(R.id.url_bar).
             initializeCompositorContent(mLayoutManager, findViewById(R.id.url_bar),
                     mContentContainer, mControlContainer);
 
@@ skipping 1446 matching lines @@
 
     private boolean shouldCreateNewTabsUsingBottomSheet() {
         if (mShouldCreateNewTabsUsingBottomSheet == null) {
             mShouldCreateNewTabsUsingBottomSheet = getBottomSheet() != null
                     && ChromeFeatureList.isEnabled(ChromeFeatureList.CHROME_HOME_NTP_REDESIGN);
         }
 
         return mShouldCreateNewTabsUsingBottomSheet;
     }
 }