Replaced is_null() with is_valid in SurfaceId and related classes.

content/public/test/browser_test_utils.cc

 // Copyright (c) 2012 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/public/test/browser_test_utils.h"
 
 #include <stddef.h>
 #include <tuple>
 #include <utility>
 
@@ skipping 1134 matching lines @@
 }
 
 // TODO(wjmaclean): The next two functions are a modified version of
 // SurfaceHitTestReadyNotifier that (1) works for BrowserPlugin-based guests,
 // and (2) links outside of content-browsertests. At some point in time we
 // should probably merge these.
 namespace {
 
 bool ContainsSurfaceId(cc::SurfaceId container_surface_id,
                        RenderWidgetHostViewChildFrame* target_view) {
-  if (container_surface_id.is_null())
+  if (!container_surface_id.is_valid())
     return false;
   for (cc::SurfaceId id :
        GetSurfaceManager()->GetSurfaceForId(container_surface_id)
            ->referenced_surfaces()) {
     if (id == target_view->SurfaceIdForTesting() ||
         ContainsSurfaceId(id, target_view))
       return true;
   }
   return false;
 }
@@ skipping 601 matching lines @@
 
   std::string ascii_message = base::UTF16ToASCII(message);
   if (base::MatchPattern(ascii_message, filter_)) {
     message_ = ascii_message;
     message_loop_runner_->Quit();
   }
   return false;
 }
 
 }  // namespace content