Use a diff that ignores trailing whitespaces to get by some layout test failures.

tests/DumpRenderTree/src/com/android/dumprendertree/FsUtils.java

@@ -26,6 +26,7 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.FileReader;
 import java.io.IOException;
+import java.util.regex.Pattern;
 
 public class FsUtils {
 
@@ -121,4 +122,38 @@ public class FsUtils {
         return url;
     }
 
+    public static boolean diffIgnoreSpaces(String file1, String file2)  throws IOException {
+        BufferedReader br1 = new BufferedReader(new FileReader(file1));
+        BufferedReader br2 = new BufferedReader(new FileReader(file2));
+        boolean same = true;
+        Pattern trailingSpace = Pattern.compile("\\s+$");
+
+        while(true) {
+            String line1 = br1.readLine();
+            String line2 = br2.readLine();
+
+            if (line1 == null && line2 == null)
+                break;
+            if (line1 != null) {
+                line1 = trailingSpace.matcher(line1).replaceAll("");
+            } else {
+                line1 = "";
+            }
+            if (line2 != null) {
+                line2 = trailingSpace.matcher(line2).replaceAll("");
+            } else {
+                line2 = "";
+            }
+            if(!line1.equals(line2)) {
+                same = false;
+                break;
+            }
+        }
+
+        br1.close();
+        br2.close();
+
+        return same;
+    }
+
 }

tests/DumpRenderTree/src/com/android/dumprendertree/LayoutTestsAutoTest.java

@@ -249,28 +249,11 @@ public class LayoutTestsAutoTest extends ActivityInstrumentationTestCase2<TestSh
         File expected = new File(expectedResultFile);
         if (actual.exists() && expected.exists()) {
             try {
-                boolean passing = true;
+                if (FsUtils.diffIgnoreSpaces(actualResultFile, expectedResultFile)) {
-                BufferedReader fr = new BufferedReader(new FileReader(actual));
-                BufferedReader fe = new BufferedReader(new FileReader(expected));
-                while (true) {
-                    String s1 = fr.readLine();
-                    String s2 = fe.readLine();
-                    if (s1 == null && s2 == null)
-                        break; // both files are the same
-                    if (s1 == null || s2 == null || !s1.equals(s2)) {
-                        passing = false;
-                        break;
-                    }
-                }
-
-                if (passing) {
                     passedCase(testFile);
                 } else {
                     failedCase(testFile);
                 }
-
-                fe.close();
-                fr.close();
             } catch (FileNotFoundException ex) {
                 Log.e(LOGTAG, "File not found : " + ex.getMessage());
             } catch (IOException ex) {