DevTools: throttle calls to ToolbarMenuButton.trigger() to avoid bad context menu state on Mac

third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js

Index: third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js b/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
index cf8fa00496ce10a0b13f27bba42c2a221a6e0ff1..cc0645ffa7f83f29ab17de60bc3f31a808dd8218 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
@@ -657,11 +657,17 @@ WebInspector.ToolbarMenuButton = class extends WebInspector.ToolbarButton {
    */
   _trigger(event) {
     delete this._triggerTimeout;
+
+    // Throttling avoids entering a bad state on Macs when rapidly triggering context menus just
+    // after the window gains focus. See crbug.com/655556
+    if (this._lastTriggerTime && Date.now() - this._lastTriggerTime < 300)
+      return;
     var contextMenu = new WebInspector.ContextMenu(
         event, this._useSoftMenu, this.element.totalOffsetLeft(),
         this.element.totalOffsetTop() + this.element.offsetHeight);
     this._contextMenuHandler(contextMenu);
     contextMenu.show();
+    this._lastTriggerTime = Date.now();
   }
 
   /**