DevTools: track more elements panel user actions

third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js

Index: third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
diff --git a/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js b/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
index 0eb0d410bfe22e7482f82bc6be1f12585c6cfad5..0a4d97862500f44edfb5d198b99775fd635ee065 100644
--- a/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
+++ b/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
@@ -56,6 +56,7 @@ Elements.StylesSidebarPane = class extends Elements.ElementsSidebarPane {
     this._sectionBlocks = [];
     Elements.StylesSidebarPane._instance = this;
     UI.context.addFlavorChangeListener(SDK.DOMNode, this.forceUpdate, this);
+    this.element.addEventListener('copy', this._clipboardCopy.bind(this));
   }
 
   /**
@@ -493,6 +494,13 @@ Elements.StylesSidebarPane = class extends Elements.ElementsSidebarPane {
       sections = sections.concat(block.sections);
     return sections;
   }
+
+  /**
+   * @param {!Event} event
+   */
+  _clipboardCopy(event) {
+    Host.userMetrics.actionTaken(Host.UserMetrics.Action.StyleRuleCopied);
+  }
 };
 
 Elements.StylesSidebarPane._maxLinkLength = 30;