Re-enable disabled checks in resource-timing-sizes-multipart.html

The checks of entry.encodedBodySize and entry.decodedBodySize in the
http/tests/misc/resource-timing-sizes-multipart.html layout test were
disabled because the values of those fields were nonsense.

Those fields now have meaningful values, so re-enable the checks.

BUG=631004

Change-Id: Id7902c194d03b4f26b9bdab5c891aa21cbddd01c
Reviewed-on: https://chromium-review.googlesource.com/1036965
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556379}

third_party/WebKit/LayoutTests/http/tests/misc/resource-timing-sizes-multipart.html

@@ -26,10 +26,8 @@
 function checkTransferSize(entry) {
     // These comparisons are not strict because multipart responses are
     // non-standard. Any reasonable answer is acceptable.
-    // TODO(ricea): encodedBodySize and decodedBodySize don't pass.
-    // Fix the code or make this test even more relaxed. See crbug.com/631004.
-    // assert_greater_than(entry.encodedBodySize, abePngSize - 1, 'encodedBodySize');
-    // assert_greater_than(entry.decodedBodySize, abePngSize - 1, 'decodedBodySize');
+    assert_greater_than(entry.encodedBodySize, abePngSize - 1, 'encodedBodySize');
+    assert_greater_than(entry.decodedBodySize, abePngSize - 1, 'decodedBodySize');
     assert_greater_than(entry.transferSize, abePngSize + minHeaderSize, 'transferSize');
     t.done();
 }