Eliminate skia::PlatformCanvas - Step 1

skia/ext/platform_canvas.h

Index: skia/ext/platform_canvas.h
===================================================================
--- skia/ext/platform_canvas.h	(revision 80026)
+++ skia/ext/platform_canvas.h	(working copy)
@@ -114,6 +114,18 @@
   PlatformCanvas& operator=(const PlatformCanvas&);
 };
 
+// These calls should surround calls to platform drawing routines, the
+// surface returned here can be used with the native platform routines
+//
+// Call EndPlatformPaint when you are done and want to use skia operations
+// after calling the platform-specific BeginPlatformPaint; this will
+// synchronize the bitmap to OS if necessary.
+//
+// Note: These functions will eventually replace
+// PlatformCanvas::beginPlatformPaint and PlatformCanvas::endPlatformPaint.
+SK_API PlatformDevice::PlatformSurface BeginPlatformPaint(SkCanvas* canvas);
+SK_API void EndPlatformPaint(SkCanvas* canvas);
+
 }  // namespace skia
 
 #endif  // SKIA_EXT_PLATFORM_CANVAS_H_