Wire up SDL on Android

include/views/SkOSWindow_SDL.h

-
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-
 #ifndef SkOSWindow_SDL_DEFINED
 #define SkOSWindow_SDL_DEFINED
 
 #include "SDL.h"
 #include "SDL_opengl.h"
 #include "SkWindow.h"
 
-
 class SkOSWindow : public SkWindow {
 public:
     SkOSWindow(void* screen);
     virtual ~SkOSWindow();
 
-    static bool PostEvent(SkEvent* evt, SkEventSinkID, SkMSec delay) { SkFAIL("not implemented\n");
-    return false;
+    static bool PostEvent(SkEvent* evt, SkEventSinkID, SkMSec delay) {
+        SkFAIL("not implemented\n");
+        return false;
     }
 
     enum SkBackEndTypes {
         kNone_BackEndType,
         kNativeGL_BackEndType,
 #if SK_ANGLE
         kANGLE_BackEndType,
 #endif // SK_ANGLE
 #if SK_COMMAND_BUFFER
         kCommandBuffer_BackEndType,
 #endif // SK_COMMAND_BUFFER
     };
 
     void detach();
     bool attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo*);
     void present();
     bool makeFullscreen();
     void setVsync(bool);
     void closeWindow();
     void loop() {
         while (!fQuit) {
             this->handleEvents();
             this->update(nullptr);
         }
     }
 
 protected:
     void onSetTitle(const char title[]) override;
+    void onHandleInval(const SkIRect&) override;
+    void onPDFSaved(const char title[], const char desc[], const char path[]) override;
 
 private:
     void handleEvents();
     bool fQuit;
+    uint32_t fWindowFlags;
     SDL_Window* fWindow;
     SDL_GLContext fGLContext;
 
     typedef SkWindow INHERITED;
 };
 
 #endif