Disable swipe gesture and smoothly scroll

Smoothly scroll effect also triggers TalkBack read previous screen after navigate to new screen.

BUG=602373, 628255

Review-Url: https://codereview.chromium.org/2166383002
Cr-Commit-Position: refs/heads/master@{#407149}

chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java

@@ -8,7 +8,6 @@ import android.app.Activity;
 import android.app.Fragment;
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v4.view.ViewPager;
 import android.support.v7.app.AppCompatActivity;
 import android.text.TextUtils;
 
@@ -84,7 +83,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
     private boolean mNativeSideIsInitialized;
 
     private ProfileDataCache mProfileDataCache;
-    private ViewPager mPager;
+    private FirstRunViewPager mPager;
 
     private Bundle mFreProperties;
 
@@ -147,7 +146,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
             return;
         }
 
-        mPager = new ViewPager(this);
+        mPager = new FirstRunViewPager(this);
         mPager.setId(R.id.fre_pager);
         setContentView(mPager);
 
@@ -234,7 +233,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
         if (mPager.getCurrentItem() == 0) {
             abortFirstRunExperience();
         } else {
-            mPager.setCurrentItem(mPager.getCurrentItem() - 1);
+            mPager.setCurrentItem(mPager.getCurrentItem() - 1, false);
         }
     }
 
@@ -247,7 +246,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
 
     @Override
     public void advanceToNextPage() {
-        jumpToPage(mPager.getCurrentItem() + 1, true);
+        jumpToPage(mPager.getCurrentItem() + 1);
     }
 
     @Override
@@ -356,7 +355,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
         FirstRunStatus.setSkipWelcomePage(FirstRunActivity.this, true);
         flushPersistentData();
         stopProgressionIfNotAcceptedTermsOfService();
-        jumpToPage(mPager.getCurrentItem() + 1, true);
+        jumpToPage(mPager.getCurrentItem() + 1);
     }
 
     @Override
@@ -389,9 +388,8 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
      * Transitions to a given page.
      * @return Whether the transition to a given page was allowed.
      * @param position A page index to transition to.
-     * @param smooth   Whether the transition should be smooth.
      */
-    private boolean jumpToPage(int position, boolean smooth) {
+    private boolean jumpToPage(int position) {
         if (mShowWelcomePage && !didAcceptTermsOfService()) {
             return position == 0;
         }
@@ -399,7 +397,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
             completeFirstRunExperience();
             return false;
         }
-        mPager.setCurrentItem(position, smooth);
+        mPager.setCurrentItem(position, false);
         return true;
     }
 
@@ -415,7 +413,7 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
         while (currentPageIndex < mPagerAdapter.getCount()) {
             FirstRunPage currentPage = (FirstRunPage) mPagerAdapter.getItem(currentPageIndex);
             if (!currentPage.shouldSkipPageOnCreate(getApplicationContext())) return;
-            if (!jumpToPage(currentPageIndex + 1, false)) return;
+            if (!jumpToPage(currentPageIndex + 1)) return;
             currentPageIndex = mPager.getCurrentItem();
         }
     }

chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunViewPager.java

+// Copyright 2016 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.firstrun;
+
+import android.content.Context;
+import android.support.v4.view.ViewPager;
+import android.view.MotionEvent;
+
+/**
+* ViewPager without swipe gesture.
+*/
+public class FirstRunViewPager extends ViewPager {
+    FirstRunViewPager(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        return false;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent event) {
+        return false;
+    }
+}

chrome/android/java_sources.gni

@@ -347,6 +347,7 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/firstrun/FirstRunSignInProcessor.java",
   "java/src/org/chromium/chrome/browser/firstrun/FirstRunStatus.java",
   "java/src/org/chromium/chrome/browser/firstrun/FirstRunView.java",
+  "java/src/org/chromium/chrome/browser/firstrun/FirstRunViewPager.java",
   "java/src/org/chromium/chrome/browser/firstrun/ForcedSigninProcessor.java",
   "java/src/org/chromium/chrome/browser/firstrun/ProfileDataCache.java",
   "java/src/org/chromium/chrome/browser/firstrun/ToSAckedReceiver.java",