DevTools: fix zoomed color swatch size.

BUG=424021
NOTRY=true

Review URL: https://codereview.chromium.org/658043002

git-svn-id: svn://svn.chromium.org/blink/trunk@183785 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/inspectorStyle.css

@@ -1743,6 +1743,7 @@ li.editing-sub-part .delete-button {
     position: relative;
     top: 1px;
     display: inline-block;
+    line-height: 1px;
     background-image: url(Images/checker.png);
     -webkit-user-select: none;
 }