Optionally clear PlatformCanvas instances.

skia/ext/vector_platform_device_emf_win.cc

Index: skia/ext/vector_platform_device_emf_win.cc
===================================================================
--- skia/ext/vector_platform_device_emf_win.cc	(revision 123041)
+++ skia/ext/vector_platform_device_emf_win.cc	(working copy)
@@ -16,8 +16,8 @@
 
 // static
 SkDevice* VectorPlatformDeviceEmf::CreateDevice(
-    int width, int height, bool is_opaque, HANDLE shared_section) {
-  if (!is_opaque) {
+    int width, int height, int flags, HANDLE shared_section) {
+  if (!flags & FLAGS_OPAQUE) {
     // TODO(maruel):  http://crbug.com/18382 When restoring a semi-transparent
     // layer, i.e. merging it, we need to rasterize it because GDI doesn't
     // support transparency except for AlphaBlend(). Right now, a
@@ -26,8 +26,7 @@
     // EMF-based VectorDevice and have this device registers the drawing. When
     // playing back the device into a bitmap, do it at the printer's dpi instead
     // of the layout's dpi (which is much lower).
-    return BitmapPlatformDevice::create(width, height, is_opaque,
-                                        shared_section);
+    return BitmapPlatformDevice::create(width, height, flags, shared_section);
   }
 
   // TODO(maruel):  http://crbug.com/18383 Look if it would be worth to