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 94a5c81b832727fb6a92c82f297dc23a4f9885e2..261790ff85017d412145b1c7b935bce4f86ad647 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js
@@ -715,12 +715,18 @@ WebInspector.ToolbarMenuButton.prototype = {
     _trigger: function(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();
     },
 
     /**