Don't process messages sent to dead routing ids.

chrome/browser/extensions/api/declarative_content/declarative_content_condition_tracker_test.cc

 // Copyright 2015 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 "chrome/browser/extensions/api/declarative_content/declarative_content_condition_tracker_test.h"
 
 #include "base/run_loop.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 10 matching lines @@
 DeclarativeContentConditionTrackerTest::
 ~DeclarativeContentConditionTrackerTest() {
   // MockRenderProcessHosts are deleted from the message loop, and their
   // deletion must complete before RenderViewHostTestEnabler's destructor is
   // run.
   base::RunLoop().RunUntilIdle();
 }
 
 scoped_ptr<content::WebContents>
 DeclarativeContentConditionTrackerTest::MakeTab() {
-  return make_scoped_ptr(content::WebContentsTester::CreateTestWebContents(
-      profile_.get(),
-      nullptr));
+  scoped_ptr<content::WebContents> tab(
+      content::WebContentsTester::CreateTestWebContents(profile_.get(),
+                                                        nullptr));
+  content::RenderFrameHostTester::For(tab->GetMainFrame())
+      ->InitializeRenderFrameIfNeeded();
+  return tab;
 }
 
 content::MockRenderProcessHost*
 DeclarativeContentConditionTrackerTest::GetMockRenderProcessHost(
     content::WebContents* contents) {
   return static_cast<content::MockRenderProcessHost*>(
       contents->GetRenderViewHost()->GetProcess());
 }
 
 const void* DeclarativeContentConditionTrackerTest::GeneratePredicateGroupID() {
   // The group ID is opaque to the trackers.
   return reinterpret_cast<const void*>(next_predicate_group_id_++);
 }
 
 }  // namespace extensions