Start using the third_party/android_tools target for customtabs library

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTab.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.customtabs;
 
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
 import android.os.IBinder;
@@ skipping 73 matching lines @@
                         mSession, CustomTabsCallback.NAVIGATION_ABORTED);
                 mPageLoadStartedTimestamp = SystemClock.elapsedRealtime();
             }
             mCustomTabsConnection.notifyNavigationEvent(
                     mSession, CustomTabsCallback.NAVIGATION_STARTED);
         }
 
         @Override
         public void onShown(Tab tab) {
             mCustomTabsConnection.notifyNavigationEvent(
-                    mSession, CustomTabsCallback.TAB_SHOWN);
+                    mSession, TAB_SHOWN);
         }
 
         @Override
         public void onPageLoadFinished(Tab tab) {
             long pageLoadFinishedTimestamp = SystemClock.elapsedRealtime();
             mCustomTabsConnection.notifyNavigationEvent(
                     mSession, CustomTabsCallback.NAVIGATION_FINISHED);
             // Both histograms (commit and PLT) are reported here, to make sure
             // that they are always recorded together, and that we only record
             // commits for successful navigations.
@@ skipping 27 matching lines @@
             mCustomTabsConnection.notifyNavigationEvent(
                     mSession, CustomTabsCallback.NAVIGATION_FAILED);
         }
 
         private void resetPageLoadTracking() {
             mCurrentState = STATE_RESET;
             mIntentReceivedTimestamp = -1;
         }
     }
 
+    static final int TAB_SHOWN = CustomTabsCallback.NAVIGATION_FAILED + 1;
+    static final int TAB_HIDDEN = CustomTabsCallback.NAVIGATION_FAILED + 2;
+
     private ExternalNavigationHandler mNavigationHandler;
     private CustomTabNavigationDelegate mNavigationDelegate;
     private TabChromeContextMenuItemDelegate
             mContextMenuDelegate = new TabChromeContextMenuItemDelegate() {
                 @Override
                 public boolean startDownload(String url, boolean isLink) {
                     // Behave similarly to ChromeTabChromeContextMenuItemDelegate in ChromeTab.
                     return !isLink || !shouldInterceptContextMenuDownload(url);
                 }
             };
@@ skipping 175 matching lines @@
             // See http://crbug.com/369574.
             if (e.getCause() != null && e.getCause() instanceof TransactionTooLargeException) {
                 Log.e(TAG, "Could not resolve Activity for intent " + intent.toString(), e);
             } else {
                 throw e;
             }
         }
     }
 
 }