Adding ThreadChecker validation to d'tors for client classes

remoting/client/display/gl_cursor_feedback.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 "remoting/client/display/gl_cursor_feedback.h"
 
 #include <math.h>
 
 #include <array>
 
@@ skipping 27 matching lines @@
   static const float kExpansionNormalization = get_unnormalized_coeff(1);
   return get_unnormalized_coeff(progress) / kExpansionNormalization;
 }
 
 }  // namespace
 
 namespace remoting {
 
 GlCursorFeedback::GlCursorFeedback() : weak_factory_(this) {}
 
-GlCursorFeedback::~GlCursorFeedback() {}
+GlCursorFeedback::~GlCursorFeedback() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
 
 void GlCursorFeedback::SetCanvas(base::WeakPtr<Canvas> canvas) {
   if (!canvas) {
     layer_.reset();
     return;
   }
   layer_.reset(new GlRenderLayer(kGlCursorFeedbackTextureId, canvas));
   GlCursorFeedbackTexture* texture = GlCursorFeedbackTexture::GetInstance();
   layer_->SetTexture(texture->GetTexture().data(),
                      GlCursorFeedbackTexture::kTextureWidth,
@@ skipping 34 matching lines @@
 int GlCursorFeedback::GetZIndex() {
   return Drawable::ZIndex::CURSOR_FEEDBACK;
 }
 
 base::WeakPtr<Drawable> GlCursorFeedback::GetWeakPtr() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return weak_factory_.GetWeakPtr();
 }
 
 }  // namespace remoting