[Cronet] Remove JSON serialization of CronetEngine.Builder

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

Index: components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
diff --git a/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java b/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
index 9b023ac7fd58e85b3354b49f54510f3beb406a6d..d8e6de2cf6d89a418566485ea861d58b975cb2f1 100644
--- a/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
+++ b/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
@@ -12,6 +12,7 @@ import android.os.Looper;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.PathUtils;
+import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.test.util.Feature;
 import org.chromium.net.TestUrlRequestCallback.ResponseStep;
 
@@ -25,6 +26,7 @@ import java.util.concurrent.Executor;
 /**
  * Test CronetEngine.
  */
+@JNINamespace("cronet")
 public class CronetUrlRequestContextTest extends CronetTestBase {
     // URLs used for tests.
     private static final String TEST_URL = "http://127.0.0.1:8000";
@@ -773,4 +775,30 @@ public class CronetUrlRequestContextTest extends CronetTestBase {
         secondEngine.shutdown();
         thirdEngine.shutdown();
     }
+
+    @SmallTest
+    @Feature({"Cronet"})
+    public void testCronetEngineBuilderConfig() throws Exception {
+        // This is to prompt load of native library.
+        startCronetTestFramework();
+        // Verify CronetEngine.Builder config is passed down accurately to native code.
+        CronetEngine.Builder builder = new CronetEngine.Builder(getContext());
+        builder.enableHTTP2(false);
+        builder.enableQUIC(true);
+        builder.enableSDCH(true);
+        builder.addQuicHint("example.com", 12, 34);
+        builder.enableHttpCache(CronetEngine.Builder.HTTP_CACHE_IN_MEMORY, 54321);
+        builder.enableDataReductionProxy("abcd");
+        builder.setUserAgent("efgh");
+        builder.setExperimentalQuicConnectionOptions("ijkl");
+        builder.setDataReductionProxyOptions("mnop", "qrst", "uvwx");
+        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);
 }