Automation API hit test should automatically convert to integer coordinates.

chrome/test/data/extensions/api_test/automation/tests/desktop/hit_test.js

Index: chrome/test/data/extensions/api_test/automation/tests/desktop/hit_test.js
diff --git a/chrome/test/data/extensions/api_test/automation/tests/desktop/hit_test.js b/chrome/test/data/extensions/api_test/automation/tests/desktop/hit_test.js
index 924579c7f6fe82fa2be5c85531ab0c3513b370bf..57450169811a69c5803621db3a5a286ee3745fa8 100644
--- a/chrome/test/data/extensions/api_test/automation/tests/desktop/hit_test.js
+++ b/chrome/test/data/extensions/api_test/automation/tests/desktop/hit_test.js
@@ -20,10 +20,8 @@ var allTests = [
             button.addEventListener(EventType.ALERT, function() {
               chrome.test.succeed();
             }, true);
-            var cx = Math.floor(
-                button.location.left + button.location.width / 2);
-            var cy = Math.floor(
-                button.location.top + button.location.height / 2);
+            var cx = button.location.left + button.location.width / 2;
+            var cy = button.location.top + button.location.height / 2;
             desktop.hitTest(cx, cy, EventType.ALERT);
           }
         }