Add placement new macros to SkPostConfig, call SkNEW* from Ganesh.

TODO: unify with the placement new implementation in SkTemplatesPriv.h,
once various issues there are overcome. reed@ should be taking the lead
there.

http://codereview.appspot.com/6384043/



git-svn-id: http://skia.googlecode.com/svn/trunk@4492 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLCreateNullInterface.cpp b/src/gpu/gl/GrGLCreateNullInterface.cpp
index b9a3c5e..6451fca 100644
--- a/src/gpu/gl/GrGLCreateNullInterface.cpp
+++ b/src/gpu/gl/GrGLCreateNullInterface.cpp
@@ -388,7 +388,7 @@
     // interface
     static SkAutoTUnref<GrGLInterface> glInterface;
     if (!glInterface.get()) {
-        GrGLInterface* interface = new GrGLInterface;
+        GrGLInterface* interface = SkNEW(GrGLInterface);
         glInterface.reset(interface);
         interface->fBindingsExported = kDesktop_GrGLBinding;
         interface->fActiveTexture = nullGLActiveTexture;