name-calc-img.html harness failure because 3 tests have the same name.

Update the names to be unique.

Also, allow this test to run. It run 1000 times without a flake.
I don't know what fixed the flakiness (or maybe it just doesn't repro
on my desktop, we'll see soon).

Bug: 527270
Change-Id: I520b443cd3dbec260ab632d6d58ed302a5622ca5
Reviewed-on: https://chromium-review.googlesource.com/c/1309560
Commit-Queue: Fergal Daly <fergal@chromium.org>
Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607145}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2613,8 +2613,6 @@ crbug.com/591500 [ Win10 ] virtual/layout_ng_experimental/printing/ellipsis-prin
 
 crbug.com/353746 virtual/android/fullscreen/video-specified-size.html [ Failure Pass ]
 
-crbug.com/527270 accessibility/name-calc-img.html [ Failure Pass Timeout ]
-
 # Win7 does not support the needed DirectWrite APIs for font fallback
 crbug.com/459056 [ Win7 ] fast/text/font-fallback-win.html [ Failure ]
 

third_party/WebKit/LayoutTests/accessibility/name-calc-img.html

@@ -40,7 +40,7 @@ test(function(t) {
     var axImg3 = accessibilityController.accessibleElementById("img3");
     assert_equals(axImg3.name, "img3-alt");
     assert_equals(axImg3.nameFrom, "attribute");
-}, "img element with title and alt");
+}, "img element with title and alt img3");
 </script>
 
 <div class="container">
@@ -52,7 +52,7 @@ test(function(t) {
     var axImg4 = accessibilityController.accessibleElementById("img4");
     assert_equals(axImg4.name, "img4-aria-label");
     assert_equals(axImg4.nameFrom, "attribute");
-}, "img element with title and alt");
+}, "img element with title and alt img4");
 </script>
 
 <div class="container">
@@ -65,7 +65,7 @@ test(function(t) {
     var axImg5 = accessibilityController.accessibleElementById("img5");
     assert_equals(axImg5.name, "img5-aria-labelledby");
     assert_equals(axImg5.nameFrom, "relatedElement");
-}, "img element with title and alt");
+}, "img element with title and alt img5");
 </script>
 
 <script>