Add RasterWindowContext_mac

tools/viewer/Viewer.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 "Viewer.h"
 
 #include "GMSlide.h"
@@ skipping 162 matching lines @@
         this->setupCurrentSlide(previousSlide);
     });
     fCommands.addCommand(Window::Key::kUp, "Up", "Transform", "Zoom in", [this]() {
         this->changeZoomLevel(1.f / 32.f);
         fWindow->inval();
     });
     fCommands.addCommand(Window::Key::kDown, "Down", "Transform", "Zoom out", [this]() {
         this->changeZoomLevel(-1.f / 32.f);
         fWindow->inval();
     });
-#ifdef SK_BUILD_FOR_WIN
+#if defined(SK_BUILD_FOR_WIN) || defined(SK_BUILD_FOR_MAC)
     fCommands.addCommand('d', "Modes", "Change rendering backend", [this]() {
         if (sk_app::Window::kRaster_BackendType == fBackendType) {
             fBackendType = sk_app::Window::kNativeGL_BackendType;
 #ifdef SK_VULKAN
         } else if (sk_app::Window::kNativeGL_BackendType == fBackendType) {
             fBackendType = sk_app::Window::kVulkan_BackendType;
 #endif
         } else {
             fBackendType = sk_app::Window::kRaster_BackendType;
         }
@@ skipping 452 matching lines @@
             updateUIState();
         }
     } else if (stateName.equals(kRefreshStateName)) {
         // This state is actually NOT in the UI state.
         // We use this to allow Android to quickly set bool fRefresh.
         fRefresh = stateValue.equals(kON);
     } else {
         SkDebugf("Unknown stateName: %s", stateName.c_str());
     }
 }