use surface in SkView/SampleApp

src/views/mac/SkNSView.mm

-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #import "SkNSView.h"
 #include "SkCanvas.h"
+#include "SkSurface.h"
 #include "SkCGUtils.h"
 #include "SkEvent.h"
 SK_COMPILE_ASSERT(SK_SUPPORT_GPU, not_implemented_for_non_gpu_build);
 #include <OpenGL/gl.h>
 
 //#define FORCE_REDRAW
 // Can be dropped when we no longer support 10.6.
 #define RETINA_API_AVAILABLE (defined(MAC_OS_X_VERSION_10_7) && \
                               MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
 @implementation SkNSView
@@ skipping 101 matching lines @@
     self.fGLContext = nil;
     self.fTitle = nil;
     [super dealloc];
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 - (void)drawSkia {
     fRedrawRequestPending = false;
     if (fWind) {
-        SkAutoTUnref<SkCanvas> canvas(fWind->createCanvas());
-        fWind->draw(canvas);
+        SkAutoTUnref<SkSurface> surface(fWind->createSurface());
+        fWind->draw(surface->getCanvas());
 #ifdef FORCE_REDRAW
         fWind->inval(NULL);
 #endif
     }
 }
 
 - (void)setSkTitle:(const char *)title {
     self.fTitle = [NSString stringWithUTF8String:title];
     [[self window] setTitle:self.fTitle];
 }
@@ skipping 264 matching lines @@
     [fGLContext release];
     fGLContext = nil;
 }
 
 - (void)present {
     if (nil != fGLContext) {
         [fGLContext flushBuffer];
     }
 }
 @end