Add stream operator for SurfaceId/FrameSinkId/LocalFrameId.

services/ui/ws/frame_generator.cc

 // Copyright 2016 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 "services/ui/ws/frame_generator.h"
 
 #include "base/containers/adapters.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/render_pass_draw_quad.h"
@@ skipping 81 matching lines @@
   // TODO(kylechar): Adding surface references should be synchronized with
   // SubmitCompositorFrame().
 
   auto iter = active_references_.find(surface_id.frame_sink_id());
   if (iter == active_references_.end()) {
     AddFirstReference(surface_id, window);
     return;
   }
 
   SurfaceReference& ref = iter->second;
-  DCHECK(surface_id.frame_sink_id() == ref.child_id.frame_sink_id());
+  DCHECK_EQ(surface_id.frame_sink_id(), ref.child_id.frame_sink_id());
 
   // This shouldn't be called multiple times for the same SurfaceId.
-  DCHECK(surface_id.local_frame_id() != ref.child_id.local_frame_id());
+  DCHECK_NE(surface_id.local_frame_id(), ref.child_id.local_frame_id());
 
   // Add a reference from parent to new surface first.
   GetDisplayCompositor()->AddSurfaceReference(ref.parent_id, surface_id);
 
   // If the display root surface has changed, update all references to embedded
   // surfaces. For example, this would happen when the display resolution or
   // zoom level changes.
   if (!window->parent())
     AddNewParentReferences(ref.child_id, surface_id);
 
@@ skipping 258 matching lines @@
   cc::SurfaceId underlay_surface_id =
       window->compositor_frame_sink_manager()->GetLatestSurfaceId(
           mojom::CompositorFrameSinkType::UNDERLAY);
   if (underlay_surface_id.is_valid())
     RemoveFrameSinkReference(underlay_surface_id.frame_sink_id());
 }
 
 }  // namespace ws
 
 }  // namespace ui