Remove tr.b.findFirstKeyInDictMatching.

tracing/tracing/ui/base/mouse_modes.html

Index: tracing/tracing/ui/base/mouse_modes.html
diff --git a/tracing/tracing/ui/base/mouse_modes.html b/tracing/tracing/ui/base/mouse_modes.html
index 8b6f662eeeaa921c7ef3d31ffe79345a4ea9ade0..8d68f0279cc6b0fe4303d40130288d523d4d0279 100644
--- a/tracing/tracing/ui/base/mouse_modes.html
+++ b/tracing/tracing/ui/base/mouse_modes.html
@@ -19,6 +19,7 @@ tr.exportTo('tr.ui.b', function() {
 
   const MOUSE_SELECTOR_MODE_INFOS = {};
   MOUSE_SELECTOR_MODE_INFOS[MOUSE_SELECTOR_MODE.PANSCAN] = {
+    name: 'PANSCAN',
     mode: MOUSE_SELECTOR_MODE.PANSCAN,
     title: 'pan',
     eventNames: {
@@ -32,6 +33,7 @@ tr.exportTo('tr.ui.b', function() {
     defaultBackgroundPosition: '0 -10px'
   };
   MOUSE_SELECTOR_MODE_INFOS[MOUSE_SELECTOR_MODE.SELECTION] = {
+    name: 'SELECTION',
     mode: MOUSE_SELECTOR_MODE.SELECTION,
     title: 'selection',
     eventNames: {
@@ -46,6 +48,7 @@ tr.exportTo('tr.ui.b', function() {
   };
 
   MOUSE_SELECTOR_MODE_INFOS[MOUSE_SELECTOR_MODE.ZOOM] = {
+    name: 'ZOOM',
     mode: MOUSE_SELECTOR_MODE.ZOOM,
     title: 'zoom',
     eventNames: {
@@ -59,6 +62,7 @@ tr.exportTo('tr.ui.b', function() {
     defaultBackgroundPosition: '0 -70px'
   };
   MOUSE_SELECTOR_MODE_INFOS[MOUSE_SELECTOR_MODE.TIMING] = {
+    name: 'TIMING',
     mode: MOUSE_SELECTOR_MODE.TIMING,
     title: 'timing',
     eventNames: {
@@ -72,6 +76,7 @@ tr.exportTo('tr.ui.b', function() {
     defaultBackgroundPosition: '0 -100px'
   };
   MOUSE_SELECTOR_MODE_INFOS[MOUSE_SELECTOR_MODE.ROTATE] = {
+    name: 'ROTATE',
     mode: MOUSE_SELECTOR_MODE.ROTATE,
     title: 'rotate',
     eventNames: {