Add R11 EAC pixel config

include/gpu/GrColor.h

Index: include/gpu/GrColor.h
diff --git a/include/gpu/GrColor.h b/include/gpu/GrColor.h
index 1994cc501076f8763c0d2e6013196bb13bbf0384..0e636e1b8fbd9013f2909594b650b7d391efe68f 100644
--- a/include/gpu/GrColor.h
+++ b/include/gpu/GrColor.h
@@ -134,6 +134,7 @@ static inline uint32_t GrPixelConfigComponentMask(GrPixelConfig config) {
         kRGBA_GrColorComponentFlags,    // kBGRA_8888_GrPixelConfig
         kRGB_GrColorComponentFlags,     // kETC1_GrPixelConfig
         kA_GrColorComponentFlag,        // kLATC_GrPixelConfig
+        kA_GrColorComponentFlag,        // kR11_EAC_GrPixelConfig
     };
     return kFlags[config];
 
@@ -146,6 +147,7 @@ static inline uint32_t GrPixelConfigComponentMask(GrPixelConfig config) {
     GR_STATIC_ASSERT(6 == kBGRA_8888_GrPixelConfig);
     GR_STATIC_ASSERT(7 == kETC1_GrPixelConfig);
     GR_STATIC_ASSERT(8 == kLATC_GrPixelConfig);
+    GR_STATIC_ASSERT(9 == kR11_EAC_GrPixelConfig);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kFlags) == kGrPixelConfigCnt);
 }