Remove PlatformCanvas::GetBitmapContext()

skia/ext/bitmap_platform_device_mac.h

Index: skia/ext/bitmap_platform_device_mac.h
diff --git a/skia/ext/bitmap_platform_device_mac.h b/skia/ext/bitmap_platform_device_mac.h
index 0f8ddf8adcd8a9354fab27d222e421cd41327d7d..10dce7fefac81d4e38c6c2c765d146d6d14d1e0e 100644
--- a/skia/ext/bitmap_platform_device_mac.h
+++ b/skia/ext/bitmap_platform_device_mac.h
@@ -46,10 +46,6 @@ class SK_API BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice
 
   ~BitmapPlatformDevice() override;
 
-  // PlatformDevice overrides
-  CGContextRef GetBitmapContext(const SkMatrix& transform,
-                                const SkIRect& clip_bounds) override;
-
  protected:
   BitmapPlatformDevice(CGContextRef context,
                        const SkBitmap& bitmap);
@@ -57,6 +53,9 @@ class SK_API BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice
   SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;
 
  private:
+  NativeDrawingContext BeginPlatformPaint(const SkMatrix& transform,
+                                          const SkIRect& clip_bounds) override;
+
   void ReleaseBitmapContext();
 
   // Loads the current transform and clip into the context. Can be called even