Fix chrome_java FindBugs errors found when switching to n sdk.

chrome/test/android/javatests/src/org/chromium/chrome/test/util/RenderUtils.java

Index: chrome/test/android/javatests/src/org/chromium/chrome/test/util/RenderUtils.java
diff --git a/chrome/test/android/javatests/src/org/chromium/chrome/test/util/RenderUtils.java b/chrome/test/android/javatests/src/org/chromium/chrome/test/util/RenderUtils.java
index 9d1ebb223dd1e10f7d1412754990c76e05c565ff..85438516e313581640aba653cd1adc18f68dafb5 100644
--- a/chrome/test/android/javatests/src/org/chromium/chrome/test/util/RenderUtils.java
+++ b/chrome/test/android/javatests/src/org/chromium/chrome/test/util/RenderUtils.java
@@ -177,8 +177,11 @@ public class RenderUtils {
      */
     private static void saveBitmap(Bitmap bitmap, File file) throws IOException {
         FileOutputStream out = new FileOutputStream(file);
-        bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
-        out.close();
+        try {
+            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
+        } finally {
+            out.close();
+        }
     }
 
     /**
@@ -207,4 +210,4 @@ public class RenderUtils {
         if (golden == null) return ComparisonResult.GOLDEN_NOT_FOUND;
         return bitmap.sameAs(golden) ? ComparisonResult.MATCH : ComparisonResult.MISMATCH;
     }
-}
+}