Revert of Add samples to Viewer.

tools/viewer/SampleSlide.cpp

-/*
-* Copyright 2016 Google Inc.
-*
-* Use of this source code is governed by a BSD-style license that can be
-* found in the LICENSE file.
-*/
-
-#include "SampleSlide.h"
-
-#include "SkCanvas.h"
-#include "SkCommonFlags.h"
-#include "SkOSFile.h"
-#include "SkStream.h"
-
-SampleSlide::SampleSlide(const SkViewFactory* factory) : fViewFactory(factory) {
-    SkView* view = (*factory)();
-    SampleCode::RequestTitle(view, &fName);
-    view->unref();
-}
-
-SampleSlide::~SampleSlide() {}
-
-void SampleSlide::draw(SkCanvas* canvas) {
-    fView->draw(canvas);
-}
-
-void SampleSlide::load(SkScalar winWidth, SkScalar winHeight) {
-    fView = (*fViewFactory)();
-    fView->setVisibleP(true);
-    fView->setClipToBounds(false);
-    fView->setSize(winWidth, winHeight);
-}
-
-void SampleSlide::unload() {
-    fView->unref();
-    fView = nullptr;
-}