DevTools: extract treeoutline triangle icons from toolbarButtonGlyphs.png

third_party/WebKit/Source/devtools/front_end/data_grid/dataGrid.css

Index: third_party/WebKit/Source/devtools/front_end/data_grid/dataGrid.css
diff --git a/third_party/WebKit/Source/devtools/front_end/data_grid/dataGrid.css b/third_party/WebKit/Source/devtools/front_end/data_grid/dataGrid.css
index 83ca802e1ab983a4ebed9004d9a84bc33c0f59fa..877fcc26bac38fe4b80f98e31dca5f05c4e4124c 100644
--- a/third_party/WebKit/Source/devtools/front_end/data_grid/dataGrid.css
+++ b/third_party/WebKit/Source/devtools/front_end/data_grid/dataGrid.css
@@ -176,9 +176,9 @@
 
 .data-grid td.disclosure::before {
     -webkit-user-select: none;
-    -webkit-mask-image: url(Images/toolbarButtonGlyphs.png);
-    -webkit-mask-position: -4px -96px;
-    -webkit-mask-size: 352px 168px;
+    -webkit-mask-image: url(Images/treeoutlineTriangles.png);
+    -webkit-mask-position: 0 0;
+    -webkit-mask-size: 32px 24px;
     float: left;
     width: 8px;
     height: 12px;
@@ -196,12 +196,12 @@
 
 @media (-webkit-min-device-pixel-ratio: 1.1) {
 .data-grid tr.parent td.disclosure::before {
-    -webkit-mask-image: url(Images/toolbarButtonGlyphs_2x.png);
+    -webkit-mask-image: url(Images/treeoutlineTriangles_2x.png);
 }
 } /* media */
 
 .data-grid tr.expanded td.disclosure::before {
-    -webkit-mask-position: -20px -96px;
+    -webkit-mask-position: -16px 0;
 }
 
 .data-grid tr.selected {
@@ -220,12 +220,12 @@
 
 .data-grid:focus tr.parent.selected td.disclosure::before {
     background-color: white;
-    -webkit-mask-position: -4px -96px;
+    -webkit-mask-position: 0 0;
 }
 
 .data-grid:focus tr.expanded.selected td.disclosure::before {
     background-color: white;
-    -webkit-mask-position: -20px -96px;
+    -webkit-mask-position: -16px 0;
 }
 
 .data-grid-resizer {