separate state for msaa renderability

R=robertphillips@google.com, brian@thesalomons.net

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/26695005

git-svn-id: http://skia.googlecode.com/svn/trunk@11770 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 3709acf..bfca12f 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -406,7 +406,7 @@
         desc.fWidth = clipSpaceIBounds.width();
         desc.fHeight = clipSpaceIBounds.height();
         desc.fConfig = kRGBA_8888_GrPixelConfig;
-        if (this->getContext()->isConfigRenderable(kAlpha_8_GrPixelConfig)) {
+        if (this->getContext()->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
             // We would always like A8 but it isn't supported on all platforms
             desc.fConfig = kAlpha_8_GrPixelConfig;
         }