Revert of Fetch Finch seed during restore

components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedFetcher.java

Index: components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedFetcher.java
diff --git a/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedFetcher.java b/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedFetcher.java
deleted file mode 100644
index 7f117590184ddb894530066a1f8b4447baa7c040..0000000000000000000000000000000000000000
--- a/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedFetcher.java
+++ /dev/null
@@ -1,199 +0,0 @@
-// 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.components.variations.firstrun;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.os.SystemClock;
-
-import org.chromium.base.ContextUtils;
-import org.chromium.base.Log;
-import org.chromium.base.ThreadUtils;
-import org.chromium.base.VisibleForTesting;
-import org.chromium.base.metrics.CachedMetrics.SparseHistogramSample;
-import org.chromium.base.metrics.CachedMetrics.TimesHistogramSample;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.HttpURLConnection;
-import java.net.MalformedURLException;
-import java.net.SocketTimeoutException;
-import java.net.URL;
-import java.net.UnknownHostException;
-import java.util.concurrent.TimeUnit;
-
-/**
- * Fetches the variations seed before the actual first run of Chrome.
- */
-public class VariationsSeedFetcher {
-    private static final String TAG = "VariationsSeedFetch";
-    private static final String VARIATIONS_SERVER_URL =
-            "https://clientservices.googleapis.com/chrome-variations/seed?osname=android";
-
-    private static final int BUFFER_SIZE = 4096;
-    private static final int READ_TIMEOUT = 3000; // time in ms
-    private static final int REQUEST_TIMEOUT = 1000; // time in ms
-
-    // Values for the "Variations.FirstRun.SeedFetchResult" sparse histogram, which also logs
-    // HTTP result codes. These are negative so that they don't conflict with the HTTP codes.
-    // These values should not be renumbered or re-used since they are logged to UMA.
-    private static final int SEED_FETCH_RESULT_UNKNOWN_HOST_EXCEPTION = -3;
-    private static final int SEED_FETCH_RESULT_TIMEOUT = -2;
-    private static final int SEED_FETCH_RESULT_IOEXCEPTION = -1;
-
-    @VisibleForTesting
-    static final String VARIATIONS_INITIALIZED_PREF = "variations_initialized";
-
-    // Synchronization lock
-    private static final Object sLock = new Object();
-
-    private static VariationsSeedFetcher sInstance;
-
-    @VisibleForTesting
-    VariationsSeedFetcher() {}
-
-    public static VariationsSeedFetcher get() {
-        // TODO(aberent) Check not running on UI thread. Doing so however makes Robolectric testing
-        // of dependent classes difficult.
-        synchronized (sLock) {
-            if (sInstance == null) {
-                sInstance = new VariationsSeedFetcher();
-            }
-            return sInstance;
-        }
-    }
-
-    /**
-     * Override the VariationsSeedFetcher, typically with a mock, for testing classes that depend on
-     * this one.
-     * @param fetcher the mock.
-     */
-    @VisibleForTesting
-    public static void setVariationsSeedFetcherForTesting(VariationsSeedFetcher fetcher) {
-        sInstance = fetcher;
-    }
-
-    @VisibleForTesting
-    protected HttpURLConnection getServerConnection() throws MalformedURLException, IOException {
-        URL url = new URL(VARIATIONS_SERVER_URL);
-        return (HttpURLConnection) url.openConnection();
-    }
-
-    /**
-     * Fetch the first run variations seed.
-     */
-    public void fetchSeed() {
-        assert !ThreadUtils.runningOnUiThread();
-        // Prevent multiple simultaneous fetches
-        synchronized (sLock) {
-            Context context = ContextUtils.getApplicationContext();
-            SharedPreferences prefs = ContextUtils.getAppSharedPreferences();
-            // Early return if an attempt has already been made to fetch the seed, even if it
-            // failed. Only attempt to get the initial Java seed once, since a failure probably
-            // indicates a network problem that is unlikely to be resolved by a second attempt.
-            // Note that VariationsSeedBridge.hasNativePref() is a pure Java function, reading an
-            // Android preference that is set when the seed is fetched by the native code.
-            if (prefs.getBoolean(VARIATIONS_INITIALIZED_PREF, false)
-                    || VariationsSeedBridge.hasNativePref(context)) {
-                return;
-            }
-            downloadContent(context);
-            prefs.edit().putBoolean(VARIATIONS_INITIALIZED_PREF, true).apply();
-        }
-    }
-
-    private void recordFetchResultOrCode(int resultOrCode) {
-        SparseHistogramSample histogram =
-                new SparseHistogramSample("Variations.FirstRun.SeedFetchResult");
-        histogram.record(resultOrCode);
-    }
-
-    private void recordSeedFetchTime(long timeDeltaMillis) {
-        Log.i(TAG, "Fetched first run seed in " + timeDeltaMillis + " ms");
-        TimesHistogramSample histogram = new TimesHistogramSample(
-                "Variations.FirstRun.SeedFetchTime", TimeUnit.MILLISECONDS);
-        histogram.record(timeDeltaMillis);
-    }
-
-    private void recordSeedConnectTime(long timeDeltaMillis) {
-        TimesHistogramSample histogram = new TimesHistogramSample(
-                "Variations.FirstRun.SeedConnectTime", TimeUnit.MILLISECONDS);
-        histogram.record(timeDeltaMillis);
-    }
-
-    private void downloadContent(Context context) {
-        HttpURLConnection connection = null;
-        try {
-            long startTimeMillis = SystemClock.elapsedRealtime();
-            connection = getServerConnection();
-            connection.setReadTimeout(READ_TIMEOUT);
-            connection.setConnectTimeout(REQUEST_TIMEOUT);
-            connection.setDoInput(true);
-            connection.setRequestProperty("A-IM", "gzip");
-            connection.connect();
-            int responseCode = connection.getResponseCode();
-            recordFetchResultOrCode(responseCode);
-            if (responseCode != HttpURLConnection.HTTP_OK) {
-                Log.w(TAG, "Non-OK response code = %d", responseCode);
-                return;
-            }
-
-            recordSeedConnectTime(SystemClock.elapsedRealtime() - startTimeMillis);
-            // Convert the InputStream into a byte array.
-            byte[] rawSeed = getRawSeed(connection);
-            String signature = getHeaderFieldOrEmpty(connection, "X-Seed-Signature");
-            String country = getHeaderFieldOrEmpty(connection, "X-Country");
-            String date = getHeaderFieldOrEmpty(connection, "Date");
-            boolean isGzipCompressed = getHeaderFieldOrEmpty(connection, "IM").equals("gzip");
-            VariationsSeedBridge.setVariationsFirstRunSeed(
-                    context, rawSeed, signature, country, date, isGzipCompressed);
-            recordSeedFetchTime(SystemClock.elapsedRealtime() - startTimeMillis);
-        } catch (SocketTimeoutException e) {
-            recordFetchResultOrCode(SEED_FETCH_RESULT_TIMEOUT);
-            Log.w(TAG, "SocketTimeoutException fetching first run seed: ", e);
-        } catch (UnknownHostException e) {
-            recordFetchResultOrCode(SEED_FETCH_RESULT_UNKNOWN_HOST_EXCEPTION);
-            Log.w(TAG, "UnknownHostException fetching first run seed: ", e);
-        } catch (IOException e) {
-            recordFetchResultOrCode(SEED_FETCH_RESULT_IOEXCEPTION);
-            Log.w(TAG, "IOException fetching first run seed: ", e);
-        } finally {
-            if (connection != null) {
-                connection.disconnect();
-            }
-        }
-    }
-
-    private String getHeaderFieldOrEmpty(HttpURLConnection connection, String name) {
-        String headerField = connection.getHeaderField(name);
-        if (headerField == null) {
-            return "";
-        }
-        return headerField.trim();
-    }
-
-    private byte[] getRawSeed(HttpURLConnection connection) throws IOException {
-        InputStream inputStream = null;
-        try {
-            inputStream = connection.getInputStream();
-            return convertInputStreamToByteArray(inputStream);
-        } finally {
-            if (inputStream != null) {
-                inputStream.close();
-            }
-        }
-    }
-
-    private byte[] convertInputStreamToByteArray(InputStream inputStream) throws IOException {
-        ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
-        byte[] buffer = new byte[BUFFER_SIZE];
-        int charactersReadCount = 0;
-        while ((charactersReadCount = inputStream.read(buffer)) != -1) {
-            byteBuffer.write(buffer, 0, charactersReadCount);
-        }
-        return byteBuffer.toByteArray();
-    }
-}