Make GrCaps and GrShaderCaps private.

Moves getCaps() from GrContext to GrContextPriv and removes unused refCaps().

Change-Id: Ic6a8951b656c0d1b2773eae73bff8e88af819866
Reviewed-on: https://skia-review.googlesource.com/127389
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/tests/PrimitiveProcessorTest.cpp b/tests/PrimitiveProcessorTest.cpp
index b5f508b..3a9ab8d 100644
--- a/tests/PrimitiveProcessorTest.cpp
+++ b/tests/PrimitiveProcessorTest.cpp
@@ -12,6 +12,7 @@
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
+#include "GrContextPriv.h"
 #include "GrGeometryProcessor.h"
 #include "GrGpu.h"
 #include "GrOpFlushState.h"
@@ -123,7 +124,7 @@
         ERRORF(reporter, "Could not create render target context.");
         return;
     }
-    int attribCnt = context->caps()->maxVertexAttributes();
+    int attribCnt = context->contextPriv().caps()->maxVertexAttributes();
     if (!attribCnt) {
         ERRORF(reporter, "No attributes allowed?!");
         return;