Allow for no pdf rasterizers in gm.

gm/gmmain.cpp

Index: gm/gmmain.cpp
===================================================================
--- gm/gmmain.cpp	(revision 14665)
+++ gm/gmmain.cpp	(working copy)
@@ -1330,6 +1330,8 @@
 #ifdef SK_BUILD_NATIVE_PDF_RENDERER
     { &SkNativeRasterizePDF,  "native",  true },
 #endif  // SK_BUILD_NATIVE_PDF_RENDERER
+    // The following exists so that this array is never zero length.

[epoger, 2014/05/09 14:35:30]

I take it you investigated making the code properly handle a zero-length array,
but that was more trouble than it was worth?

[bungeman-skia, 2014/05/09 14:56:15]

Well, it's technically against the c++ specification to declare a static/stack
array of length 0. GCC seems to allow it as an extension, but VC++ doesn't allow
it. The only other thing I can think of is to make this an SkTDArray or
something and then init it somewhere. However, that's a lot of extra work.

[epoger, 2014/05/09 15:15:36]

Wow, "The More You Know".  Thanks; I'm a little sheepish that I didn't know this
already!

+    { &SkNoRasterizePDF,      "none",    false},
 };
 
 static const char kDefaultsConfigStr[] = "defaults";