Update from https://crrev.com/306706

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 8921117aa4d406a45b0adedd780d96ff5c14d02d..33ce2149e42a29523d1705b67f1a18910e1f7d02 100644
--- a/skia/ext/bitmap_platform_device_mac.h
+++ b/skia/ext/bitmap_platform_device_mac.h
@@ -35,12 +35,7 @@ class SK_API BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice
   // is not initialized.
   static BitmapPlatformDevice* Create(CGContextRef context,
                                       int width, int height,
-                                      bool is_opaque);
-
-  // Creates a BitmapPlatformDevice instance.  If |is_opaque| is false,
-  // then the bitmap is initialzed to 0.
-  static BitmapPlatformDevice* CreateAndClear(int width, int height,
-                                              bool is_opaque);
+                                      bool is_opaque, bool do_clear = false);
 
   // Creates a context for |data| and calls Create.
   // If |data| is NULL, then the bitmap backing store is not initialized.