Start the process of choosing the correct compression format

src/gpu/GrSWMaskHelper.h

Index: src/gpu/GrSWMaskHelper.h
diff --git a/src/gpu/GrSWMaskHelper.h b/src/gpu/GrSWMaskHelper.h
index ad1d432ea6237183677795f2c986dc737fbde150..6af6a777a63ab96608ef280e5910ead582be323c 100644
--- a/src/gpu/GrSWMaskHelper.h
+++ b/src/gpu/GrSWMaskHelper.h
@@ -42,7 +42,7 @@ class GrDrawTarget;
 class GrSWMaskHelper : SkNoncopyable {
 public:
     GrSWMaskHelper(GrContext* context)
-    : fContext(context) {
+    : fContext(context), fCompressMask(false) {
     }
 
     // set up the internal state in preparation for draws. Since many masks
@@ -102,9 +102,8 @@ private:
     SkDraw          fDraw;
     SkRasterClip    fRasterClip;
 

[robertphillips, 2014/07/30 12:15:50]

// Should the mask be compressed? If true, fCompressedFormat is always valid. ?

[krajcevski, 2014/07/30 15:10:19]

Done.

-#if GR_COMPRESS_ALPHA_MASK
+    bool                        fCompressMask;

[robertphillips, 2014/07/30 12:15:49]

// Only set when 'fCompressMask' is true. ?

[krajcevski, 2014/07/30 15:10:19]

Done.

     SkTextureCompressor::Format fCompressedFormat;
-#endif
 
     // Actually sends the texture data to the GPU. This is called from
     // toTexture with the data filled in depending on the texture config.