Do not wait for the double tap timeout on pages with fixed page scale

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

 // Copyright (c) 2012 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.content.browser;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
@@ skipping 953 matching lines @@
     public ContentSettings getContentSettings() {
         return mContentSettings;
     }
 
     @Override
     public boolean didUIStealScroll(float x, float y) {
         return getContentViewClient().shouldOverrideScroll(
                 x, y, computeHorizontalScrollOffset(), computeVerticalScrollOffset());
     }
 
+    @Override
+    public boolean hasFixedPageScale() {
+        return mNativeMinimumScale == mNativeMaximumScale;
+    }
+
     private void hidePopupDialog() {
         SelectPopupDialog.hide(this);
     }
 
     void hideSelectActionBar() {
         if (mActionBarVisible) {
             mActionBarVisible = false;
             mImeAdapter.unselect();
             getContentViewClient().onContextualActionBarHidden();
         }
@@ skipping 1208 matching lines @@
     private native void nativeAddJavascriptInterface(int nativeContentViewCoreImpl, Object object,
                                                      String name, boolean requireAnnotation);
 
     private native void nativeRemoveJavascriptInterface(int nativeContentViewCoreImpl, String name);
 
     private native int nativeGetNavigationHistory(int nativeContentViewCoreImpl, Object context);
 
     private native void nativeUpdateVSyncParameters(int nativeContentViewCoreImpl,
             long timebaseMicros, long intervalMicros);
 }