Add PlatformPictureSkia and RecordingPlatformDeviceSkia.

skia/ext/platform_device.h

Index: skia/ext/platform_device.h
diff --git a/skia/ext/platform_device.h b/skia/ext/platform_device.h
index 69efb3f723356896f234cf0ae767a804ffc060ca..625c5d1bdb71dde634714c21fa578362d3af4d56 100644
--- a/skia/ext/platform_device.h
+++ b/skia/ext/platform_device.h
@@ -96,6 +96,26 @@ SK_API bool IsPreviewMetafile(const SkCanvas& canvas);
 // provide to allow for drawing by the native platform into the device.
 class SK_API PlatformDevice {
  public:
+  enum PlatformPaint {
+    //
+    // PlatformPaint Support
+    //
+    // Platform specific paint operations can not be used to draw on the
+    // given canvas. BeginPlatformPaint will return NULL PlatformSurface.
+    PLATFORM_PAINT_UNSUPPORTED,
+
+    // Platform specific paint operations can be used to draw on the given
+    // canvas without causing an intermediate bitmap to be created.
+    PLATFORM_PAINT_DIRECT,
+
+    // Platform specific paint operations can be used to draw on the given
+    // canvas but it might cause an intermediate bitmap to be created.
+    // Allocating and setting up an intermediate bitmap can be expensive.
+    // It is recommended to avoid using platform paint if possible when
+    // platform paint support is indirect.
+    PLATFORM_PAINT_INDIRECT
+  };
+
   virtual ~PlatformDevice() {}
 
 #if defined(OS_MACOSX)
@@ -121,8 +141,8 @@ class SK_API PlatformDevice {
   virtual void DrawToNativeContext(PlatformSurface surface, int x, int y,
                                    const PlatformRect* src_rect) = 0;
 
-  // Returns true if GDI operations can be used for drawing into the bitmap.
-  virtual bool SupportsPlatformPaint();
+  // Returns support for platform specific paint operations.
+  virtual PlatformPaint PlatformPaintSupport();
 
 #if defined(OS_WIN)
   // Loads a SkPath into the GDI context. The path can there after be used for