Remove PlatformCanvas::GetBitmapContext()

skia/ext/bitmap_platform_device_mac.cc

Index: skia/ext/bitmap_platform_device_mac.cc
diff --git a/skia/ext/bitmap_platform_device_mac.cc b/skia/ext/bitmap_platform_device_mac.cc
index ba5f81be324398effb767e19536134eceb6798c1..67ad2a9fa2354d271ed43748dda0b5c94b67a260 100644
--- a/skia/ext/bitmap_platform_device_mac.cc
+++ b/skia/ext/bitmap_platform_device_mac.cc
@@ -244,8 +244,9 @@ BitmapPlatformDevice::~BitmapPlatformDevice() {
     CGContextRelease(bitmap_context_);
 }
 
-CGContextRef BitmapPlatformDevice::GetBitmapContext(const SkMatrix& transform,
-                                                    const SkIRect& clip_bounds) {
+NativeDrawingContext BitmapPlatformDevice::BeginPlatformPaint(
+    const SkMatrix& transform,
+    const SkIRect& clip_bounds) {
   LoadConfig(transform, clip_bounds);
   return bitmap_context_;
 }