skia: Added SkDiscardableMemory interface.

include/core/SkGraphics.h

Index: include/core/SkGraphics.h
diff --git a/include/core/SkGraphics.h b/include/core/SkGraphics.h
index c87604259077e82486f793d79d1ed66f093d7739..0e589274e2423c52e324406be06a765a511700f2 100644
--- a/include/core/SkGraphics.h
+++ b/include/core/SkGraphics.h
@@ -12,6 +12,8 @@
 
 #include "SkTypes.h"
 
+class SkDiscardableMemoryFactory;
+
 class SK_API SkGraphics {
 public:
     /**
@@ -64,6 +66,9 @@ public:
     static size_t GetImageCacheByteLimit();
     static size_t SetImageCacheByteLimit(size_t newLimit);
 
+    static void SetSkDiscardableMemoryFactory(

[scroggo, 2013/08/15 14:06:06]

Once SetSkDiscardableMemoryFactory does something, will the SkGraphics take
ownership of the SkDiscardableMemoryFactory?

Looks like the implementation uses a singleton. Can you add a comment that
states that SkGraphics does not manage the factory's lifecycle?

[ernstm, 2013/08/15 20:26:37]

Replaced SkDiscardableMemoryFactory by a factory function.

+        SkDiscardableMemoryFactory* factory);
+
     /**
      *  Applications with command line options may pass optional state, such
      *  as cache sizes, here, for instance: