OOPIF: Don't crash when running layout tests that have an OOP iframe.

content/shell/renderer/test_runner/accessibility_controller.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/renderer/test_runner/accessibility_controller.h"
 
 #include "gin/handle.h"
 #include "gin/object_template_builder.h"
 #include "gin/wrappable.h"
 #include "third_party/WebKit/public/web/WebElement.h"
@@ skipping 150 matching lines @@
 bool AccessibilityController::ShouldLogAccessibilityEvents() {
   return log_accessibility_events_;
 }
 
 void AccessibilityController::NotificationReceived(
     const blink::WebAXObject& target, const std::string& notification_name) {
   v8::Isolate* isolate = blink::mainThreadIsolate();
   v8::HandleScope handle_scope(isolate);
 
   blink::WebFrame* frame = web_view_->mainFrame();
-  if (!frame)
+  if (!frame || frame->isWebRemoteFrame())
     return;
 
   v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
   if (context.IsEmpty())
     return;
 
   v8::Context::Scope context_scope(context);
 
   // Call notification listeners on the element.
   v8::Handle<v8::Object> element_handle = elements_.GetOrCreate(target);
@@ skipping 87 matching lines @@
     v8::Handle<v8::Object> result =
         FindAccessibleElementByIdRecursive(obj.childAt(i), id);
     if (*result)
       return result;
   }
 
   return v8::Handle<v8::Object>();
 }
 
 }  // namespace content