DevTools: polish the MQ ruler, move zoom controls to the top.

Source/devtools/front_end/toolbox/MediaQueryInspector.js

Index: Source/devtools/front_end/toolbox/MediaQueryInspector.js
diff --git a/Source/devtools/front_end/toolbox/MediaQueryInspector.js b/Source/devtools/front_end/toolbox/MediaQueryInspector.js
index 4c8676f0ddb791db1974c5dd402c8dba7f458178..88b7ce1e0ad33ad62b634dfd3ca8f6cd7b1903b2 100644
--- a/Source/devtools/front_end/toolbox/MediaQueryInspector.js
+++ b/Source/devtools/front_end/toolbox/MediaQueryInspector.js
@@ -320,14 +320,11 @@ WebInspector.MediaQueryInspector.prototype = {
         for (var i = children.length - 1; i >= 0; --i) {
             if (found) {
                 children[i].classList.remove("media-inspector-marker-highlight");
-                children[i].classList.remove("media-inspector-marker-under-highlighted");
             } else if (children[i] === marker) {
                 children[i].classList.add("media-inspector-marker-highlight");
-                children[i].classList.remove("media-inspector-marker-under-highlighted");
                 found = true;
             } else {
                 children[i].classList.remove("media-inspector-marker-highlight");
-                children[i].classList.add("media-inspector-marker-under-highlighted");
             }
         }
     },
@@ -373,18 +370,20 @@ WebInspector.MediaQueryInspector.prototype = {
         if (typeof widthPixelValue === "number")
             markerElement.style.width = widthPixelValue + "px";
 
-        if (model.maxWidthExpression()) {
-            var labelClass = model.section() === WebInspector.MediaQueryInspector.Section.MinMax ? "media-inspector-label-left" : "media-inspector-label-right";
-            var labelContainer = markerElement.createChild("div", "media-inspector-marker-label-container media-inspector-marker-label-container-right");
-            labelContainer.createChild("div", "media-inspector-marker-serif");
-            labelContainer.createChild("span", "media-inspector-marker-label " + labelClass).textContent = model.maxWidthExpression().computedLength() + "px";
-        }
-
         if (model.minWidthExpression()) {
             var labelClass = model.section() === WebInspector.MediaQueryInspector.Section.MinMax ? "media-inspector-label-right" : "media-inspector-label-left";
             var labelContainer = markerElement.createChild("div", "media-inspector-marker-label-container media-inspector-marker-label-container-left");
-            labelContainer.createChild("div", "media-inspector-marker-serif");
             labelContainer.createChild("span", "media-inspector-marker-label " + labelClass).textContent = model.minWidthExpression().computedLength() + "px";
+            markerElement.title = model.minWidthExpression().computedLength() + "px";
+            if (model.maxWidthExpression())
+                markerElement.title += WebInspector.UIString(" \u2014 ");
+        }
+
+        if (model.maxWidthExpression()) {
+            var labelClass = model.section() === WebInspector.MediaQueryInspector.Section.MinMax ? "media-inspector-label-left" : "media-inspector-label-right";
+            var labelContainer = markerElement.createChild("div", "media-inspector-marker-label-container media-inspector-marker-label-container-right");
+            labelContainer.createChild("span", "media-inspector-marker-label " + labelClass).textContent = model.maxWidthExpression().computedLength() + "px";
+            markerElement.title += model.maxWidthExpression().computedLength() + "px";
         }
 
         return markerElement;