Fixes #575026 : DevTools CPU Flamechart - use node.url to assign color to flamecharts rather than node.functionName:node.url

BUG=575026

Also increasing the color range. In the current color scheme the colors have a very short range for CPU Flamecharts. This means stacks from different urls are easily identifiable.

Review URL: https://codereview.chromium.org/1623613004

Cr-Commit-Position: refs/heads/master@{#373329}
diff --git a/AUTHORS b/AUTHORS
index 2a9d198..b91daf7f 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -433,6 +433,7 @@
 Nikita Ofitserov <[email protected]>
 Ningxin Hu <[email protected]>
 Nitish Mehrotra <[email protected]>
+Noj Vek <[email protected]>
 Nolan Cao <[email protected]>
 Pan Deng <[email protected]>
 Parag Radke <[email protected]>