Add SkImageGenerator Interface

src/ports/SkDiscardableMemory_none.cpp

Index: src/ports/SkDiscardableMemory_none.cpp
diff --git a/src/ports/SkDiscardableMemory_none.cpp b/src/ports/SkDiscardableMemory_none.cpp
index 6559097e625aa2646caee81e370c0b6687db2781..5bc790b0db11db50fbbb747cccdb77a3ae01c3f6 100644
--- a/src/ports/SkDiscardableMemory_none.cpp
+++ b/src/ports/SkDiscardableMemory_none.cpp
@@ -5,8 +5,8 @@
  * found in the LICENSE file.
  */
 
-#include "SkDiscardableMemory.h"
+#include "SkBasicDiscardableMemory.h"
 
 SkDiscardableMemory* SkDiscardableMemory::Create(size_t bytes) {
-    return NULL;
+    return SkBasicDiscardableMemory::Create(bytes);

[scroggo, 2013/11/19 22:19:27]

If we're going to do this, can we at least put a printf that the actual memory
is not discardable?

[hal.canary, 2013/11/20 00:07:10]

I don't like a lot of verbosity in my unit tests (which is where this will be
used).

[scroggo, 2013/11/20 14:21:53]

Fair enough. Here's my concern though. Someone can call
SkDiscardableMemory::Create(), expecting to get some memory that may be purged
under memory pressure. Instead, they get something that never purges. That said,
maybe this is fine, since the header is in src, and it makes no promises that it
will ever be purged. I think Chrome doesn't build ports.gyp, so they shouldn't
run into this problem.

 }