Fix texture allocation in SWMaskHelper

https://codereview.chromium.org/19789006/



git-svn-id: http://skia.googlecode.com/svn/trunk@10197 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrSWMaskHelper.h b/src/gpu/GrSWMaskHelper.h
index ce5ae28..fab5eeb 100644
--- a/src/gpu/GrSWMaskHelper.h
+++ b/src/gpu/GrSWMaskHelper.h
@@ -63,8 +63,7 @@
     bool getTexture(GrAutoScratchTexture* texture);
 
     // Move the mask generation results from the internal bitmap to the gpu.
-    // The space outside of the mask is cleared using "alpha"
-    void toTexture(GrTexture* texture, uint8_t alpha);
+    void toTexture(GrTexture* texture);
 
     // Reset the internal bitmap
     void clear(uint8_t alpha) {