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

components/exo/surface.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 "components/exo/surface.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
@@ skipping 230 matching lines @@
   // have been cancelled.
   frame_callbacks_.splice(frame_callbacks_.end(), pending_frame_callbacks_);
   active_frame_callbacks_.splice(active_frame_callbacks_.end(),
                                  frame_callbacks_);
   for (const auto& frame_callback : active_frame_callbacks_)
     frame_callback.Run(base::TimeTicks());
 
   if (begin_frame_source_ && needs_begin_frame_)
     begin_frame_source_->RemoveObserver(this);
 
-  if (!local_frame_id_.is_null())
+  if (local_frame_id_.is_valid())
     factory_owner_->surface_factory_->Destroy(local_frame_id_);
 
   surface_manager_->UnregisterSurfaceFactoryClient(
       factory_owner_->frame_sink_id_);
 }
 
 // static
 Surface* Surface::AsSurface(const aura::Window* window) {
   return window->GetProperty(kSurfaceKey);
 }
@@ skipping 206 matching lines @@
   // We update contents if Attach() has been called since last commit.
   if (has_pending_contents_) {
     has_pending_contents_ = false;
 
     current_buffer_ = std::move(pending_buffer_);
 
     UpdateResource(true);
   }
 
   cc::LocalFrameId old_local_frame_id = local_frame_id_;
-  if (needs_commit_to_new_surface_ || local_frame_id_.is_null()) {
+  if (needs_commit_to_new_surface_ || !local_frame_id_.is_valid()) {
     needs_commit_to_new_surface_ = false;
     local_frame_id_ = factory_owner_->id_allocator_->GenerateId();
     factory_owner_->surface_factory_->Create(local_frame_id_);
   }
 
   UpdateSurface(true);
 
-  if (!old_local_frame_id.is_null() && old_local_frame_id != local_frame_id_) {
+  if (old_local_frame_id.is_valid() && old_local_frame_id != local_frame_id_) {
     factory_owner_->surface_factory_->SetPreviousFrameSurface(
         local_frame_id_, old_local_frame_id);
     factory_owner_->surface_factory_->Destroy(old_local_frame_id);
   }
 
   if (old_local_frame_id != local_frame_id_) {
     float contents_surface_to_layer_scale = 1.0;
     // The bounds must be updated before switching to the new surface, because
     // the layer may be mirrored, in which case a surface change causes the
     // mirror layer to update its surface using the latest bounds.
@@ skipping 132 matching lines @@
   begin_frame_source_ = begin_frame_source;
   UpdateNeedsBeginFrame();
 }
 
 void Surface::CheckIfSurfaceHierarchyNeedsCommitToNewSurfaces() {
   if (HasLayerHierarchyChanged())
     SetSurfaceHierarchyNeedsCommitToNewSurfaces();
 }
 
 void Surface::OnLostResources() {
-  if (local_frame_id_.is_null())
+  if (!local_frame_id_.is_valid())
     return;
 
   UpdateResource(false);
   UpdateSurface(false);
 }
 
 void Surface::OnWindowAddedToRootWindow(aura::Window* window) {
   window->layer()->GetCompositor()->AddFrameSink(
       factory_owner_->frame_sink_id_);
 }
@@ skipping 231 matching lines @@
 
 int64_t Surface::GetPropertyInternal(const void* key,
                                      int64_t default_value) const {
   std::map<const void*, Value>::const_iterator iter = prop_map_.find(key);
   if (iter == prop_map_.end())
     return default_value;
   return iter->second.value;
 }
 
 }  // namespace exo