Revert of Added MockPresentationClient to use in layout tests.

content/shell/renderer/test_runner/mock_presentation_client.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 "content/shell/renderer/test_runner/mock_presentation_client.h"
-
-#include "base/logging.h"
-#include "third_party/WebKit/public/platform/modules/presentation/WebPresentationController.h"
-
-namespace content {
-
-MockPresentationClient::MockPresentationClient()
-    : controller_(nullptr),
-      screen_availability_(false) {
-}
-
-MockPresentationClient::~MockPresentationClient() {
-}
-
-void MockPresentationClient::SetScreenAvailability(bool available) {
-  if (screen_availability_ == available)
-    return;
-  screen_availability_ = available;
-
-  if (!controller_)
-    return;
-  if (!controller_->isAvailableChangeWatched())
-    return;
-  controller_->didChangeAvailability(screen_availability_);
-}
-
-void MockPresentationClient::setController(
-    blink::WebPresentationController* controller) {
-  DCHECK(controller_ != controller && (!controller || !controller_));
-  controller_ = controller;
-  if (controller_)
-    updateAvailableChangeWatched(controller_->isAvailableChangeWatched());
-}
-
-void MockPresentationClient::updateAvailableChangeWatched(bool watched) {
-  if (!watched)
-    return;
-  DCHECK(controller_);
-  if (screen_availability_)
-    controller_->didChangeAvailability(screen_availability_);
-}
-
-}  // namespace content