[Cronet] Added a unit test in QuicTest to test async API.

components/cronet/android/test/src/org/chromium/net/QuicTestServer.java

Index: components/cronet/android/test/src/org/chromium/net/QuicTestServer.java
diff --git a/components/cronet/android/test/src/org/chromium/net/QuicTestServer.java b/components/cronet/android/test/src/org/chromium/net/QuicTestServer.java
index 8d3102c5bb1b34e68d9a0e266eb424d2933bbe00..b7f21b116d89ca9625de3fa853be6cf4b34b6d28 100644
--- a/components/cronet/android/test/src/org/chromium/net/QuicTestServer.java
+++ b/components/cronet/android/test/src/org/chromium/net/QuicTestServer.java
@@ -9,6 +9,7 @@ import android.os.ConditionVariable;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
+import org.chromium.base.Log;
 
 /**
  * Wrapper class to start a Quic test server.
@@ -16,8 +17,10 @@ import org.chromium.base.JNINamespace;
 @JNINamespace("cronet")
 public final class QuicTestServer {
     private static final ConditionVariable sBlock = new ConditionVariable();
+    private static final String TAG = Log.makeTag("QuicTestServer");
 
     public static void startQuicTestServer(Context context) {
+        TestFilesInstaller.installIfNeeded(context);
         nativeStartQuicTestServer(TestFilesInstaller.getInstalledPath(context));
         sBlock.block();
     }
@@ -41,6 +44,7 @@ public final class QuicTestServer {
 
     @CalledByNative
     private static void onServerStarted() {
+        Log.i(TAG, "Quic server started.");
         sBlock.open();
     }