Add GR_DLL builds to Ganesh (minimal exports for Chrome multi-dll for now).

Review URL:  http://codereview.appspot.com/4301044/




git-svn-id: http://skia.googlecode.com/svn/trunk@970 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrContext.h b/gpu/include/GrContext.h
index 1f90603..4058c5b 100644
--- a/gpu/include/GrContext.h
+++ b/gpu/include/GrContext.h
@@ -29,7 +29,7 @@
 class GrInOrderDrawBuffer;
 class GrPathRenderer;
 
-class GrContext : public GrRefCnt {
+class GR_API GrContext : public GrRefCnt {
 public:
     /**
      * Creates a GrContext from within a 3D context.