[Android WebView] Fix some findbugs warnings.

android_webview/javatests/src/org/chromium/android_webview/test/AwContentsClientShouldInterceptRequestTest.java

 // Copyright (c) 2012 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.android_webview.test;
 
 import android.test.suitebuilder.annotation.SmallTest;
 import android.util.Log;
 import android.util.Pair;
 
@@ skipping 150 matching lines @@
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView =
             createAwTestContainerViewOnMainSync(contentsClient);
         final AwContents awContents = testContainerView.getAwContents();
         final TestAwContentsClient.OnLoadResourceHelper onLoadResourceHelper =
             contentsClient.getOnLoadResourceHelper();
 
         final String aboutPageUrl = addAboutPageToTestServer(mWebServer);
 
         int callCount = onLoadResourceHelper.getCallCount();
-        int onPageFinishedCallCount = contentsClient.getOnPageFinishedHelper().getCallCount();
 
         loadUrlAsync(awContents, aboutPageUrl);
 
         onLoadResourceHelper.waitForCallback(callCount);
         assertEquals(aboutPageUrl, onLoadResourceHelper.getUrl());
     }
 
     @SmallTest
     @Feature({"Android-WebView"})
     public void testDoesNotCrashOnInvalidData() throws Throwable {
@@ skipping 80 matching lines @@
     @Feature({"Android-WebView"})
     public void testCalledForImage() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView =
             createAwTestContainerViewOnMainSync(contentsClient);
         final AwContents awContents = testContainerView.getAwContents();
         final TestAwContentsClient.ShouldInterceptRequestHelper shouldInterceptRequestHelper =
             contentsClient.getShouldInterceptRequestHelper();
 
         final String imagePath = "/" + CommonResources.FAVICON_FILENAME;
-        final String imageUrl = mWebServer.setResponseBase64(imagePath,
+        mWebServer.setResponseBase64(imagePath,
                 CommonResources.FAVICON_DATA_BASE64, CommonResources.getImagePngHeaders(true));
         final String pageWithImage =
             addPageToTestServer(mWebServer, "/page_with_image.html",
                     CommonResources.getOnImageLoadedHtml(CommonResources.FAVICON_FILENAME));
 
         int callCount = shouldInterceptRequestHelper.getCallCount();
         loadUrlSync(awContents, contentsClient.getOnPageFinishedHelper(), pageWithImage);
         shouldInterceptRequestHelper.waitForCallback(callCount, 2);
 
         assertEquals(2, shouldInterceptRequestHelper.getUrls().size());
@@ skipping 16 matching lines @@
                 CommonResources.makeHtmlPageFrom("",
                     "<iframe src=\"" + aboutPageUrl + "\"/>"));
 
         int callCount = shouldInterceptRequestHelper.getCallCount();
         loadUrlSync(awContents, contentsClient.getOnPageFinishedHelper(), pageWithIframe);
         shouldInterceptRequestHelper.waitForCallback(callCount, 2);
         assertEquals(2, shouldInterceptRequestHelper.getUrls().size());
         assertEquals(aboutPageUrl, shouldInterceptRequestHelper.getUrls().get(1));
     }
 }