[Android] Incorporate findbugs into android builds.

content/public/android/javatests/src/org/chromium/content/common/CleanupReferenceTest.java

 // Copyright 2013 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.content.common;
 
 import android.test.InstrumentationTestCase;
 import android.test.suitebuilder.annotation.SmallTest;
 
+import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.base.test.util.Feature;
 import org.chromium.content.browser.test.util.Criteria;
 import org.chromium.content.browser.test.util.CriteriaHelper;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
 public class CleanupReferenceTest extends InstrumentationTestCase {
 
     private static AtomicInteger sObjectCount = new AtomicInteger();
 
     private static class ReferredObject {
 
         private CleanupReference mRef;
 
         // Remember: this MUST be a static class, to avoid an implicit ref back to the
         // owning ReferredObject instance which would defeat GC of that object.
         private static class DestroyRunnable implements Runnable {
             @Override
             public void run() {
                 sObjectCount.decrementAndGet();
             }
         };
 
+        @SuppressFBWarnings("URF_UNREAD_FIELD")
         public ReferredObject() {
             sObjectCount.incrementAndGet();
             mRef = new CleanupReference(this, new DestroyRunnable());
         }
     }
 
     @Override
     public void setUp() throws Exception {
         super.setUp();
         sObjectCount.set(0);
     }
 
+    @SuppressFBWarnings("DM_GC")
     private void collectGarbage() {
         // While this is only a 'hint' to the VM, it's generally effective and sufficient on
         // dalvik. If this changes in future, maybe try allocating a few gargantuan objects
         // too, to force the GC to work.
         System.gc();
     }
 
+    @SuppressFBWarnings("DLS_DEAD_LOCAL_STORE")
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testCreateSingle() throws Throwable {
         assertEquals(0, sObjectCount.get());
 
         ReferredObject instance = new ReferredObject();
         assertEquals(1, sObjectCount.get());
 
         instance = null;
         // Ensure compiler / instrumentation does not strip out the assignment.
@@ skipping 26 matching lines @@
         collectGarbage();
         assertTrue(CriteriaHelper.pollForCriteria(new Criteria() {
             @Override
             public boolean isSatisfied() {
                 return sObjectCount.get() == 0;
             }
         }));
     }
 
 }