Implement getWebViewClient and getWebChromeClient

android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java

Index: android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java
diff --git a/android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java b/android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java
index 0748152047771c619c4a2ad238d46ac1ae12cab7..d4afe02be388c2422d60614e4305b7733c9f3898 100644
--- a/android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java
+++ b/android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java
@@ -171,10 +171,19 @@ public class WebViewContentsClientAdapter extends AwContentsClient {
         }
     }
 
+    WebViewClient getWebViewClient() {
+        // If this hasn't been set yet, return null instead of exposing sNullWebViewClient
+        return mWebViewClient == sNullWebViewClient ? null : mWebViewClient;
+    }
+
     void setWebChromeClient(WebChromeClient client) {
         mWebChromeClient = client;
     }
 
+    WebChromeClient getWebChromeClient() {
+        return mWebChromeClient;
+    }
+
     void setDownloadListener(DownloadListener listener) {
         mDownloadListener = listener;
     }