Optionally clear PlatformCanvas instances.

skia/ext/bitmap_platform_device_linux.h

Index: skia/ext/bitmap_platform_device_linux.h
===================================================================
--- skia/ext/bitmap_platform_device_linux.h	(revision 123041)
+++ skia/ext/bitmap_platform_device_linux.h	(working copy)
@@ -71,10 +71,10 @@
   BitmapPlatformDevice(const SkBitmap& other, BitmapPlatformDeviceData* data);
   virtual ~BitmapPlatformDevice();
 
-  static BitmapPlatformDevice* Create(int width, int height, bool is_opaque);
+  static BitmapPlatformDevice* Create(int width, int height, int flags);
 
   // This doesn't take ownership of |data|
-  static BitmapPlatformDevice* Create(int width, int height, bool is_opaque,
+  static BitmapPlatformDevice* Create(int width, int height, int flags,
                                       uint8_t* data);
 
   // Overridden from SkDevice:
@@ -92,7 +92,7 @@
                                              Usage usage) OVERRIDE;
 
  private:
-  static BitmapPlatformDevice* Create(int width, int height, bool is_opaque,
+  static BitmapPlatformDevice* Create(int width, int height, int flags,
                                       cairo_surface_t* surface);
 
   scoped_refptr<BitmapPlatformDeviceData> data_;