DevTools: remove UISourceCodeFrame from context when switching panels.

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

Index: third_party/WebKit/Source/devtools/front_end/ui/Context.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/Context.js b/third_party/WebKit/Source/devtools/front_end/ui/Context.js
index fdf8fb56337d60d1043354442afaa8ffa3bfbe05..df09297d604ec9ce130600145be1544212badbb1 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/Context.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/Context.js
@@ -42,10 +42,10 @@ WebInspector.Context.prototype = {
      */
     _dispatchFlavorChange: function(flavorType, flavorValue)
     {
-        self.runtime.extensions(WebInspector.ContextFlavorListener, flavorValue).map(extension => {
-            extension.instance().then(instance => /** @type {!WebInspector.ContextFlavorListener} */ (instance).flavorChanged(flavorValue));
-        });
-
+        for (var extension of self.runtime.extensions(WebInspector.ContextFlavorListener)) {
+            if (extension.hasContextType(flavorType))
+                extension.instance().then(instance => /** @type {!WebInspector.ContextFlavorListener} */ (instance).flavorChanged(flavorValue));
+        }
         var dispatcher = this._eventDispatchers.get(flavorType);
         if (!dispatcher)
             return;