Hook in rough distance field support for fonts

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/41213003

git-svn-id: http://skia.googlecode.com/svn/trunk@12229 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrBitmapTextContext.cpp b/src/gpu/GrBitmapTextContext.cpp
index d389ed6..433eda1 100755
--- a/src/gpu/GrBitmapTextContext.cpp
+++ b/src/gpu/GrBitmapTextContext.cpp
@@ -123,7 +123,11 @@
         return;
     }
     if (NULL == fStrike) {
+#if SK_DISTANCEFIELD_FONTS
+        fStrike = fContext->getFontCache()->getStrike(scaler, true);
+#else
         fStrike = fContext->getFontCache()->getStrike(scaler);
+#endif
     }
 
     GrGlyph* glyph = fStrike->getGlyph(packed, scaler);