DevTools: network log bars use CSS instead of pre-rendered images.

Source/devtools/front_end/networkLogView.css

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 325 matching lines @@
     padding-right: 2px;
     height: 6px;
     content: url(Images/graphLabelCalloutRight.png);
 }
 
 .network-graph-bar {
     position: absolute;
     top: 0;
     bottom: 0;
     margin: auto -7px;
-    border-width: 6px 7px;
-    height: 0;
+    height: 12px;
     min-width: 14px;
     opacity: 0.65;
-    -webkit-border-image: url(Images/timelinePillGray.png) 7 7 7 7;
+    border-width: 1px;
+    border-style: solid;
+    border-radius: 7px / 6px;
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8);
+
+    border-color: hsl(0, 0%, 65%);
+    background: linear-gradient(0deg, hsl(0, 0%, 73%), hsl(0, 0%, 78%));
 }
 
 .network-graph-bar.waiting,
 .network-graph-bar.waiting-right {
     opacity: 0.35;
 }
 
 /* Resource categories */
 
 
 .resource-cached .network-graph-bar {
-    -webkit-border-image: url(Images/timelineHollowPillGray.png) 7 7 7 7;
+    border-color: hsl(0, 0%, 66%);
+    background: hsla(0, 0%, 78%, 0.45);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(0, 0%, 73%),
+                inset 0 1px 0 2px hsla(0, 0%, 76%, 0.85);
 }
 
 .network-type-document .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillBlue.png) 7 7 7 7;
+    border-color: hsl(215, 49%, 52%);
+    background: linear-gradient(0deg, hsl(215, 72%, 61%), hsl(215, 100%, 69%));
 }
 
 .network-type-document.resource-cached .network-graph-bar {
-    -webkit-border-image: url(Images/timelineHollowPillBlue.png) 7 7 7 7;
+    border-color: hsl(215, 48%, 52%);

[eustas, 2013/12/26 05:13:58]

Do we need to redefine border-color in .resource-cached rules?

[pwnall-personal, 2013/12/26 05:39:57]

A couple of bars have the same border color, but most of them have slightly
different borders. Again, if losing a bit of accuracy vs the PNGs is OK, I can
make the colors more uniform. What do you think?

+    background: hsla(215, 99%, 69%, 0.45);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(215, 71%, 61%),

[eustas, 2013/12/26 05:13:58]

AFAIR, we prefer rgb/rgba for color.
(Though a little bit of hsl infiltrated to helpScreen.css)

[pwnall-personal, 2013/12/26 05:39:57]

I used HSL because all the colors in a bar have the same hue, so I used the hue
as an easy check against copy-paste errors. I figured it'd also make it easier
to tweak the colors later on.

Do you think consistency trumps ease of checking? If so, I'll change to rgb /
rgba. I did use rgba for white :D

+                inset 0 1px 0 2px hsla(215, 58%, 65%, 0.85);
 }
 
 .network-type-stylesheet .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillGreen.png) 7 7 7 7;
+    border-color: hsl(99, 34%, 52%);
+    background: linear-gradient(0deg, hsl(100, 50%, 61%), hsl(90, 50%, 64%));
 }
 
 .network-type-stylesheet.resource-cached .network-graph-bar {
-    -webkit-border-image: url(Images/timelineHollowPillGreen.png) 7 7 7 7;
+    border-color: hsl(99, 49%, 52%);
+    background: hsla(99, 100%, 69%, 0.45);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),

[eustas, 2013/12/26 05:13:58]

Can't shadow be unified for all .resource-cached?

[pwnall-personal, 2013/12/26 05:39:57]

I did this to reproduce the .png files as accurately as possible. It seems like
the colors were manually tuned, I didn't see a constant pattern of deltas
between them. I can look into using alpha box-shadows, at the cost of having
colors differ slightly from the .png versions. Would that be acceptable?

[pwnall-personal, 2013/12/26 15:44:05]

Here is the best I could get:

https://drive.google.com/file/d/0B3bJJUr5NEHYWk56SFZ5VmN6RjA
(left=unified box-shadow, right=per-class box-shadow)

This looks decent on dark colors (purple, red, blue), but really bad on light
colors (green, yellow, orange). If I put together a rule that looks ok light
colors, it'll probably bad on dark colors.

Also, FWIW, the unified rule uses 4 shadows instead of 3, because I have to use
alpha for the ring, and looks blurry at extreme zoom levels.

What do you think?

+                inset 0 0 0 2px hsl(99, 72%, 61%),
+                inset 0 1px 0 2px hsla(99, 59%, 65%, 0.85);
 }
 
 .network-type-image .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillPurple.png) 6 7 6 7;
+    border-color: hsl(272, 31%, 52%);
+    background: linear-gradient(0deg, hsl(272, 46%, 61%), hsl(272, 64%, 69%));
 }
 
 .network-type-image.resource-cached .network-graph-bar {
-    border-image: url(Images/timelineHollowPillPurple.png) 7 7 7 7;
+    border-color: hsl(272, 32%, 52%);
+    background: hsla(272, 65%, 69%, 0.45);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(272, 47%, 61%),
+                inset 0 1px 0 2px hsla(273, 38%, 65%, 0.85);
 }
 
 .network-type-font .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillRed.png) 7 7 7 7;
+    border-color: hsl(8, 49%, 52%);
+    background: linear-gradient(0deg, hsl(8, 72%, 61%), hsl(8, 100%, 69%));
 }
 
 .network-type-font.resource-cached .network-graph-bar {
-    -webkit-border-image: url(Images/timelineHollowPillRed.png) 7 7 7 7;
+    border-color: hsl(8, 49%, 52%);
+    background: hsla(8, 100%, 69%, 0.45);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(8, 72%, 61%),
+                inset 0 1px 0 2px hsla(8, 59%, 65%, 0.85);
 }
 
 .network-type-script .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillOrange.png) 7 7 7 7;
+    border-color: hsl(31, 49%, 52%);
+    background: linear-gradient(0deg, hsl(31, 72%, 61%), hsl(31, 100%, 69%));
 }
 
 .network-type-script.resource-cached .network-graph-bar {
-    -webkit-border-image: url(Images/timelineHollowPillOrange.png) 7 7 7 7;
+    border-color: hsl(31, 53%, 52%);
+    background: hsla(31, 100%, 69%, 0.45);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(31, 78%, 61%),
+                inset 0 1px 0 2px hsla(31, 64%, 65%, 0.85);
 }
 
 .network-type-xhr .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillYellow.png) 7 7 7 7;
+    border-color: hsl(53, 49%, 52%);
+    background: linear-gradient(0deg, hsl(53, 72%, 61%), hsl(53, 100%, 69%));
 }
 
 .network-type-xhr.resource-cached .network-graph-bar {
-    -webkit-border-image: url(Images/timelineHollowPillYellow.png) 7 7 7 7;
+    border-color: hsl(53, 49%, 52%);
+    background: hsla(53, 100%, 69%, 0.85);
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(53, 72%, 61%),
+                inset 0 1px 0 2px hsla(54, 59%, 65%, 0.85);
 }
 
 .network-type-websocket .network-graph-bar {
-    -webkit-border-image: url(Images/timelinePillGray.png) 7 7 7 7;
+    border-color: hsl(0, 0%, 65%);
+    background: linear-gradient(0deg, hsl(0, 0%, 73%), hsl(0, 0%, 78%));
 }
 
 .network-type-websocket.resource-cached .network-graph-bar {
-   -webkit-border-image: url(Images/timelineHollowPillGray.png) 7 7 7 7;
+    box-shadow: inset 0 1px 1px 0px rgba(255, 255, 255, 0.8),
+                inset 0 0 0 2px hsl(0, 0%, 73%),
+                inset 0 1px 0 2px hsla(0, 0%, 76%, 0.85);
 }
 
 .network-dim-cell {
     color: grey;
 }
 
 /* Dividers */
 
 .network-timeline-grid {
     position: absolute;
@@ skipping 109 matching lines @@
 }
 
 #network-container:not(.brief-mode) .data-grid tr.selected {
     background-color: transparent;
     color: #222;
 }
 
 #network-container.brief-mode .data-grid .data-container {
     padding-right: 0;
 }