Add HttpUrlConnection backed implementation of CronetEngine.

components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java

 // Copyright 2014 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.net;
 
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.os.ConditionVariable;
 import android.os.Handler;
@@ skipping 107 matching lines @@
             return mRttObservationCount;
         }
 
         public int throughputObservationCount() {
             return mThroughputObservationCount;
         }
     }
 
     @SmallTest
     @Feature({"Cronet"})
+    @OnlyRunNativeCronet

[pauljensen, 2015/12/21 20:27:58]

why is this test disabled?  please add a comment

[Charles, 2015/12/21 23:36:26]

Done.

[pauljensen, 2015/12/29 16:35:53]

We really need a test that the user-agent is set properly for the Java impl.
This is quite important and has a good chance of failure and completely
untested.  Hmm.  If we re-enliven the legacyMode() plumbing as I mentioned in
another comment, we could use that to run this test on both impls.

[Charles, 2016/01/06 19:17:51]

Done.

     public void testConfigUserAgent() throws Exception {
         String userAgentName = "User-Agent";
         String userAgentValue = "User-Agent-Value";
         CronetEngine.Builder cronetEngineBuilder = new CronetEngine.Builder(getContext());
         cronetEngineBuilder.setUserAgent(userAgentValue);
         cronetEngineBuilder.setLibraryName("cronet_tests");
         mTestFramework = startCronetTestFrameworkWithUrlAndCronetEngineBuilder(
                 TEST_URL, cronetEngineBuilder);
         assertTrue(NativeTestServer.startNativeTestServer(getContext()));
         TestUrlRequestCallback callback = new TestUrlRequestCallback();
         UrlRequest.Builder urlRequestBuilder =
                 new UrlRequest.Builder(NativeTestServer.getEchoHeaderURL(userAgentName), callback,
                         callback.getExecutor(), mTestFramework.mCronetEngine);
         urlRequestBuilder.build().start();
         callback.blockForDone();
         assertEquals(userAgentValue, callback.mResponseAsString);
     }
 
     @SmallTest
     @Feature({"Cronet"})
+    @OnlyRunNativeCronet
     // TODO(xunjieli): Remove annotation after crbug.com/539519 is fixed.
     @SuppressWarnings("deprecation")
     public void testDataReductionProxyEnabled() throws Exception {
         mTestFramework = startCronetTestFrameworkAndSkipLibraryInit();
 
         // Ensure native code is loaded before trying to start test server.
         new CronetEngine.Builder(getContext()).setLibraryName("cronet_tests").build().shutdown();
 
         assertTrue(NativeTestServer.startNativeTestServer(getContext()));
         if (!NativeTestServer.isDataReductionProxySupported()) {
@@ skipping 264 matching lines @@
                          e.getMessage());
         }
         callback.waitForNextStep();
         assertEquals(ResponseStep.ON_RESPONSE_STARTED, callback.mResponseStep);
         urlRequest.cancel();
         mTestFramework.mCronetEngine.shutdown();
     }
 
     @SmallTest
     @Feature({"Cronet"})
+    @OnlyRunNativeCronet
     public void testNetLog() throws Exception {
         Context context = getContext();
         File directory = new File(PathUtils.getDataDirectory(context));
         File file = File.createTempFile("cronet", "json", directory);
         CronetEngine cronetEngine = new CronetUrlRequestContext(
                 new CronetEngine.Builder(context).setLibraryName("cronet_tests"));
         // Start NetLog immediately after the request context is created to make
         // sure that the call won't crash the app even when the native request
         // context is not fully initialized. See crbug.com/470196.
         cronetEngine.startNetLogToFile(file.getPath(), false);
@@ skipping 82 matching lines @@
         mTestFramework.mCronetEngine.stopNetLog();
         assertTrue(file.exists());
         assertTrue(file.length() != 0);
         assertFalse(hasBytesInNetLog(file));
         assertTrue(file.delete());
         assertTrue(!file.exists());
     }
 
     @SmallTest
     @Feature({"Cronet"})
+    @OnlyRunNativeCronet
     public void testNetLogWithBytes() throws Exception {
         Context context = getContext();
         File directory = new File(PathUtils.getDataDirectory(context));
         File file = File.createTempFile("cronet", "json", directory);
         CronetEngine cronetEngine = new CronetUrlRequestContext(
                 new CronetEngine.Builder(context).setLibraryName("cronet_tests"));
         // Start NetLog with logAll as true.
         cronetEngine.startNetLogToFile(file.getPath(), true);
         // Start a request.
         TestUrlRequestCallback callback = new TestUrlRequestCallback();
@@ skipping 50 matching lines @@
         if (disableCache) {
             urlRequestBuilder.disableCache();
         }
         urlRequestBuilder.build().start();
         callback.blockForDone();
         assertEquals(expectCached, callback.mResponseInfo.wasCached());
     }
 
     @SmallTest
     @Feature({"Cronet"})
+    @OnlyRunNativeCronet
     public void testEnableHttpCacheDisabled() throws Exception {
         enableCache(CronetEngine.Builder.HTTP_CACHE_DISABLED);
         String url = NativeTestServer.getFileURL("/cacheable.txt");
         checkRequestCaching(url, false);
         checkRequestCaching(url, false);
         checkRequestCaching(url, false);
     }
 
     @SmallTest
     @Feature({"Cronet"})
@@ skipping 12 matching lines @@
         enableCache(CronetEngine.Builder.HTTP_CACHE_DISK);
         String url = NativeTestServer.getFileURL("/cacheable.txt");
         checkRequestCaching(url, false);
         checkRequestCaching(url, true);
         NativeTestServer.shutdownNativeTestServer();
         checkRequestCaching(url, true);
     }
 
     @SmallTest
     @Feature({"Cronet"})
+    @OnlyRunNativeCronet
     public void testEnableHttpCacheDiskNoHttp() throws Exception {
         enableCache(CronetEngine.Builder.HTTP_CACHE_DISABLED);
         String url = NativeTestServer.getFileURL("/cacheable.txt");
         checkRequestCaching(url, false);
         checkRequestCaching(url, false);
         checkRequestCaching(url, false);
     }
 
     @SmallTest
     @Feature({"Cronet"})
@@ skipping 167 matching lines @@
         builder.setStoragePath(CronetTestFramework.getTestStorage(getContext()));
         nativeVerifyUrlRequestContextConfig(
                 CronetUrlRequestContext.createNativeUrlRequestContextConfig(builder),
                 CronetTestFramework.getTestStorage(getContext()));
     }
 
     // Verifies that CronetEngine.Builder config from testCronetEngineBuilderConfig() is properly
     // translated to a native UrlRequestContextConfig.
     private static native void nativeVerifyUrlRequestContextConfig(long config, String storagePath);
 }