[Checkstyle] Fix misc style issues in Java files.

chrome/test/chromedriver/test/webview_shell/java/src/org/chromium/chromedriver_webview_shell/Main.java

Index: chrome/test/chromedriver/test/webview_shell/java/src/org/chromium/chromedriver_webview_shell/Main.java
diff --git a/chrome/test/chromedriver/test/webview_shell/java/src/org/chromium/chromedriver_webview_shell/Main.java b/chrome/test/chromedriver/test/webview_shell/java/src/org/chromium/chromedriver_webview_shell/Main.java
index aa13b6d066f5fc8c7177a9461f74359d3ce35e43..f1283da8b5294c24a5b23e00bf856d0e234adec7 100644
--- a/chrome/test/chromedriver/test/webview_shell/java/src/org/chromium/chromedriver_webview_shell/Main.java
+++ b/chrome/test/chromedriver/test/webview_shell/java/src/org/chromium/chromedriver_webview_shell/Main.java
@@ -6,8 +6,6 @@ package org.chromium.chromedriver_webview_shell;
 
 import android.app.Activity;
 import android.content.Intent;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.Window;
 import android.webkit.WebChromeClient;
@@ -33,11 +31,13 @@ public class Main extends Activity {
 
         final Activity activity = this;
         mWebView.setWebChromeClient(new WebChromeClient() {
+            @Override
             public void onProgressChanged(WebView view, int progress) {
                 activity.setProgress(progress * 100);
             }
          });
         mWebView.setWebViewClient(new WebViewClient() {
+            @Override
             public void onReceivedError(WebView view, int errorCode, String description,
                 String failingUrl) {
                 Toast.makeText(activity, "Error: " + description, Toast.LENGTH_SHORT).show();