Removal of dependencies on PlatformDevice classes.

skia/ext/platform_device_mac.h

Index: skia/ext/platform_device_mac.h
===================================================================
--- skia/ext/platform_device_mac.h	(revision 85672)
+++ skia/ext/platform_device_mac.h	(working copy)
@@ -17,6 +17,19 @@
 
 namespace skia {
 
+namespace platform_util {
+
+// Draws to the given graphics context. Forwards to the PlatformDevice bound
+// to |device|.  Otherwise is a NOP.
+void DrawToContext(SkDevice* device, CGContextRef context, int x, int y,
+                   const CGRect* src_rect);
+
+// Returns the CGContext that backing the SkDevice.  Forwards to the bound
+// PlatformDevice.  Returns NULL if no PlatformDevice is bound.
+CGContextRef GetBitmapContext(SkDevice* device);
+
+}  // namespace platform_util
+
 // A device is basically a wrapper around SkBitmap that provides a surface for
 // SkCanvas to draw into. Our device provides a surface CoreGraphics can also
 // write to. It also provides functionality to play well with CG drawing