Revert of - Add astcbitmap to gm slides

src/gpu/GrSWMaskHelper.cpp

Index: src/gpu/GrSWMaskHelper.cpp
diff --git a/src/gpu/GrSWMaskHelper.cpp b/src/gpu/GrSWMaskHelper.cpp
index a98343550896a74c1e292ab7041a357204b56cd8..744fa1db8ffff2b192d63a2134927630cbed18a0 100644
--- a/src/gpu/GrSWMaskHelper.cpp
+++ b/src/gpu/GrSWMaskHelper.cpp
@@ -37,33 +37,19 @@
 }
 
 static inline GrPixelConfig fmt_to_config(SkTextureCompressor::Format fmt) {
-
-    GrPixelConfig config;
-    switch (fmt) {
-        case SkTextureCompressor::kLATC_Format:
-            config = kLATC_GrPixelConfig;
-            break;
-
-        case SkTextureCompressor::kR11_EAC_Format:
-            config = kR11_EAC_GrPixelConfig;
-            break;
-
-        case SkTextureCompressor::kASTC_12x12_Format:
-            config = kASTC_12x12_GrPixelConfig;
-            break;
-
-        case SkTextureCompressor::kETC1_Format:
-            config = kETC1_GrPixelConfig;
-            break;
-
-        default:
-            SkDEBUGFAIL("No GrPixelConfig for compression format!");
-            // Best guess
-            config = kAlpha_8_GrPixelConfig;
-            break;
-    }
-
-    return config;
+    static const GrPixelConfig configMap[] = {
+        kLATC_GrPixelConfig,       // kLATC_Format,
+        kR11_EAC_GrPixelConfig,    // kR11_EAC_Format,
+        kETC1_GrPixelConfig,       // kETC1_Format,
+        kASTC_12x12_GrPixelConfig  // kASTC_12x12_Format,
+    };
+    GR_STATIC_ASSERT(0 == SkTextureCompressor::kLATC_Format);
+    GR_STATIC_ASSERT(1 == SkTextureCompressor::kR11_EAC_Format);
+    GR_STATIC_ASSERT(2 == SkTextureCompressor::kETC1_Format);
+    GR_STATIC_ASSERT(3 == SkTextureCompressor::kASTC_12x12_Format);
+    GR_STATIC_ASSERT(SK_ARRAY_COUNT(configMap) == SkTextureCompressor::kFormatCnt);
+
+    return configMap[fmt];
 }
 
 #if GR_COMPRESS_ALPHA_MASK