Possible fix to Restore text vertex buffer alloc and other optimizations.

src/gpu/GrDistanceFieldTextContext.cpp

Index: src/gpu/GrDistanceFieldTextContext.cpp
diff --git a/src/gpu/GrDistanceFieldTextContext.cpp b/src/gpu/GrDistanceFieldTextContext.cpp
index 6c51d01421b3a790a55b6bb41ef6b5d03fa4307e..91513c42960645320d2972b9643ee96e9289b159 100755
--- a/src/gpu/GrDistanceFieldTextContext.cpp
+++ b/src/gpu/GrDistanceFieldTextContext.cpp
@@ -159,7 +159,7 @@ void GrDistanceFieldTextContext::setupCoverageEffect(const SkColor& filteredColo
                                                                      lum/255.f,
                                                                      flags));
 #else
-            fCachedEffect.reset(GrDistanceFieldTextureEffect::Create(fCurrTexture,
+            fCachedEffect.reset(GrDistanceFieldTextureEffect::Create(currTexture,
                                                                      params, flags));
 #endif
         }