DevTools: New snippet button and icon

third_party/WebKit/Source/devtools/front_end/sources/navigatorTree.css

Index: third_party/WebKit/Source/devtools/front_end/sources/navigatorTree.css
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/navigatorView.css b/third_party/WebKit/Source/devtools/front_end/sources/navigatorTree.css
similarity index 95%
copy from third_party/WebKit/Source/devtools/front_end/sources/navigatorView.css
copy to third_party/WebKit/Source/devtools/front_end/sources/navigatorTree.css
index 0f08792d095e4a4889a732e66a5d516e19012048..bec0a65d2ffadb181c8bd0996e8822adaf3a0f68 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/navigatorView.css
+++ b/third_party/WebKit/Source/devtools/front_end/sources/navigatorTree.css
@@ -97,10 +97,15 @@
 }
 
 .navigator-sm-script-tree-item .icon,
-.navigator-script-tree-item .icon {
+.navigator-script-tree-item .icon,
+.navigator-snippet-tree-item .icon {
     background: linear-gradient(45deg, hsl(48, 70%, 50%), hsl(48, 70%, 70%));
 }
 
+.navigator-snippet-tree-item .icon {
+    -webkit-mask-position: -224px -96px;
+}
+
 .navigator-sm-stylesheet-tree-item .icon,
 .navigator-stylesheet-tree-item .icon {
     background: linear-gradient(45deg, hsl(256, 50%, 50%), hsl(256, 50%, 70%));
@@ -116,3 +121,7 @@
 .navigator-sm-stylesheet-tree-item .tree-element-title {
     font-style: italic;
 }
+
+:host{
+    overflow-y: auto;
+}