Start hiding deprecated skia/ext/ functions

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..dd467b438fe44027e1ae79832c9192ae8e02c328 100644
--- a/skia/ext/bitmap_platform_device_mac.h
+++ b/skia/ext/bitmap_platform_device_mac.h
@@ -27,7 +27,7 @@ namespace skia {
 // For us, that other bitmap will become invalid as soon as the device becomes
 // invalid, which may lead to subtle bugs. Therefore, DO NOT ASSIGN THE
 // DEVICE'S PIXEL DATA TO ANOTHER BITMAP, make sure you copy instead.
-class SK_API BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice {

[f(malita), 2016/08/30 17:41:23]

I think we need to keep these exported, otherwise the linker throws a fit.

[tomhudson, 2016/08/30 17:48:48]

Done.

I'm guessing we do symbolic linking with unit tests on Mac?

+class BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice {
  public:
   // Creates a BitmapPlatformDevice instance. |is_opaque| should be set if the
   // caller knows the bitmap will be completely opaque and allows some