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

content/browser/frame_host/render_widget_host_view_guest.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/browser/frame_host/render_widget_host_view_guest.h"
 
 #include <utility>
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 105 matching lines @@
     return;
   // Make sure the size of this view matches the size of the WebContentsView.
   // The two sizes may fall out of sync if we switch RenderWidgetHostViews,
   // resize, and then switch page, as is the case with interstitial pages.
   // NOTE: |guest_| is NULL in unit tests.
   if (guest_) {
     SetSize(guest_->web_contents()->GetViewBounds().size());
     // Since we were last shown, our renderer may have had a different surface
     // set (e.g. showing an interstitial), so we resend our current surface to
     // the renderer.
-    if (!local_frame_id_.is_null()) {
+    if (local_frame_id_.is_valid()) {
       cc::SurfaceSequence sequence =
           cc::SurfaceSequence(frame_sink_id_, next_surface_sequence_++);
       cc::SurfaceId surface_id(frame_sink_id_, local_frame_id_);
       GetSurfaceManager()
           ->GetSurfaceForId(surface_id)
           ->AddDestructionDependency(sequence);
       guest_->SetChildFrameSurface(surface_id, current_surface_size_,
                                    current_surface_scale_factor_, sequence);
     }
   }
@@ skipping 156 matching lines @@
     ClearCompositorSurfaceIfNecessary();
     // If the renderer changed its frame sink, reset the surface factory to
     // avoid returning stale resources.
     if (compositor_frame_sink_id != last_compositor_frame_sink_id_)
       surface_factory_->Reset();
     last_compositor_frame_sink_id_ = compositor_frame_sink_id;
     current_surface_size_ = frame_size;
     current_surface_scale_factor_ = scale_factor;
   }
 
-  if (local_frame_id_.is_null()) {
+  if (!local_frame_id_.is_valid()) {
     local_frame_id_ = id_allocator_->GenerateId();
     surface_factory_->Create(local_frame_id_);
 
     cc::SurfaceSequence sequence =
         cc::SurfaceSequence(frame_sink_id_, next_surface_sequence_++);
     // The renderer process will satisfy this dependency when it creates a
     // SurfaceLayer.
     cc::SurfaceManager* manager = GetSurfaceManager();
     cc::SurfaceId surface_id(frame_sink_id_, local_frame_id_);
     manager->GetSurfaceForId(surface_id)->AddDestructionDependency(sequence);
@@ skipping 367 matching lines @@
         gesture_event.data.scrollUpdate.inertialPhase ==
             blink::WebGestureEvent::MomentumPhase) {
       return;
     }
     host_->ForwardGestureEvent(gesture_event);
     return;
   }
 }
 
 }  // namespace content