[chromecast] Pass media task runner to VideoPlaneController.

chromecast/graphics/cast_screen.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 "chromecast/graphics/cast_screen.h"
 
 #include <stdint.h>
 
 #include "ui/aura/env.h"
 #include "ui/gfx/geometry/rect_conversions.h"
@@ skipping 15 matching lines @@
 // the size can be updated when we have actual display info at hand with
 // UpdateDisplaySize().
 const int kInitDisplayWidth = k720pWidth;
 const int kInitDisplayHeight = k720pHeight;
 
 }  // namespace
 
 CastScreen::~CastScreen() {
 }
 
+void CastScreen::SetDisplayResizeCallback(const DisplayResizeCallback& cb) {
+  DCHECK(!cb.is_null());
+  display_resize_cb_ = cb;
+}
+
 void CastScreen::UpdateDisplaySize(const gfx::Size& size) {
   display_.SetScaleAndBounds(1.0f, gfx::Rect(size));
+  if (!display_resize_cb_.is_null())
+    display_resize_cb_.Run(Size(size.width(), size.height()));
 }
 
 gfx::Point CastScreen::GetCursorScreenPoint() {
   return aura::Env::GetInstance()->last_mouse_location();
 }
 
 gfx::NativeWindow CastScreen::GetWindowUnderCursor() {
   NOTIMPLEMENTED();
   return gfx::NativeWindow(nullptr);
 }
@@ skipping 32 matching lines @@
 
 void CastScreen::RemoveObserver(gfx::DisplayObserver* observer) {
 }
 
 CastScreen::CastScreen() : display_(kDisplayId) {
   display_.SetScaleAndBounds(1.0f,
                              gfx::Rect(kInitDisplayWidth, kInitDisplayHeight));
 }
 
 }  // namespace chromecast