CL removing inheritance of SkDevice from PlatformDevice. Flavours of PlatformDevice classes now ...

skia/ext/platform_device_mac.h

Index: skia/ext/platform_device_mac.h
===================================================================
--- skia/ext/platform_device_mac.h	(revision 97282)
+++ skia/ext/platform_device_mac.h	(working copy)
@@ -27,7 +27,7 @@
 // functions.
 // This class is abstract and must be subclassed. It provides the basic
 // interface to implement it either with or without a bitmap backend.
-class PlatformDevice : public SkDevice {
+class PlatformDevice {
  public:
   typedef CGContextRef PlatformSurface;
 
@@ -66,12 +66,13 @@
                                             const SkMatrix& transformation);
 
  protected:
-  // Forwards |bitmap| to SkDevice's constructor.
-  PlatformDevice(const SkBitmap& bitmap);
+  PlatformDevice(SkDevice* device);
 
   // Loads the specified Skia transform into the device context
   static void LoadTransformToCGContext(CGContextRef context,
                                        const SkMatrix& matrix);
+
+  SkDevice* device_;
 };
 
 }  // namespace skia