Use unorm shorts for texture coordinates when rendering text.

include/gpu/GrTypesPriv.h

Index: include/gpu/GrTypesPriv.h
diff --git a/include/gpu/GrTypesPriv.h b/include/gpu/GrTypesPriv.h
index e04a912d3e4b497781dbf4366973e9411c951ab9..834c185944ac6368e07c0e86881f84a9958d8888 100644
--- a/include/gpu/GrTypesPriv.h
+++ b/include/gpu/GrTypesPriv.h
@@ -212,7 +212,7 @@ enum GrVertexAttribType {
     kUByte_GrVertexAttribType,   // unsigned byte, e.g. coverage
     kVec4ub_GrVertexAttribType,  // vector of 4 unsigned bytes, e.g. colors
 
-    kVec2s_GrVertexAttribType,   // vector of 2 shorts, e.g. texture coordinates
+    kVec2us_GrVertexAttribType,   // vector of 2 shorts, e.g. texture coordinates
 
     kInt_GrVertexAttribType,
     kUint_GrVertexAttribType,
@@ -235,7 +235,7 @@ static inline int GrVertexAttribTypeVectorCount(GrVertexAttribType type) {
     GR_STATIC_ASSERT(3 == kVec4f_GrVertexAttribType);
     GR_STATIC_ASSERT(4 == kUByte_GrVertexAttribType);
     GR_STATIC_ASSERT(5 == kVec4ub_GrVertexAttribType);
-    GR_STATIC_ASSERT(6 == kVec2s_GrVertexAttribType);
+    GR_STATIC_ASSERT(6 == kVec2us_GrVertexAttribType);
     GR_STATIC_ASSERT(7 == kInt_GrVertexAttribType);
     GR_STATIC_ASSERT(8 == kUint_GrVertexAttribType);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kCounts) == kGrVertexAttribTypeCount);
@@ -252,7 +252,7 @@ static inline size_t GrVertexAttribTypeSize(GrVertexAttribType type) {
         4*sizeof(float),        // kVec4f_GrVertexAttribType
         1*sizeof(char),         // kUByte_GrVertexAttribType
         4*sizeof(char),         // kVec4ub_GrVertexAttribType
-        2*sizeof(int16_t),      // kVec2s_GrVertexAttribType
+        2*sizeof(int16_t),      // kVec2us_GrVertexAttribType
         sizeof(int32_t),        // kInt_GrVertexAttribType
         sizeof(uint32_t)        // kUint_GrVertexAttribType
     };
@@ -264,7 +264,7 @@ static inline size_t GrVertexAttribTypeSize(GrVertexAttribType type) {
     GR_STATIC_ASSERT(3 == kVec4f_GrVertexAttribType);
     GR_STATIC_ASSERT(4 == kUByte_GrVertexAttribType);
     GR_STATIC_ASSERT(5 == kVec4ub_GrVertexAttribType);
-    GR_STATIC_ASSERT(6 == kVec2s_GrVertexAttribType);
+    GR_STATIC_ASSERT(6 == kVec2us_GrVertexAttribType);
     GR_STATIC_ASSERT(7 == kInt_GrVertexAttribType);
     GR_STATIC_ASSERT(8 == kUint_GrVertexAttribType);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kSizes) == kGrVertexAttribTypeCount);
@@ -283,7 +283,7 @@ static inline bool GrVertexAttribTypeIsIntType(GrVertexAttribType type) {
     GR_STATIC_ASSERT(3 == kVec4f_GrVertexAttribType);
     GR_STATIC_ASSERT(4 == kUByte_GrVertexAttribType);
     GR_STATIC_ASSERT(5 == kVec4ub_GrVertexAttribType);
-    GR_STATIC_ASSERT(6 == kVec2s_GrVertexAttribType);
+    GR_STATIC_ASSERT(6 == kVec2us_GrVertexAttribType);
     GR_STATIC_ASSERT(7 == kInt_GrVertexAttribType);
     GR_STATIC_ASSERT(8 == kUint_GrVertexAttribType);
     GR_STATIC_ASSERT(9 == kGrVertexAttribTypeCount);
@@ -300,7 +300,7 @@ static inline GrSLType GrVertexAttribTypeToSLType(GrVertexAttribType type) {
         case kUByte_GrVertexAttribType:
         case kFloat_GrVertexAttribType:
             return kFloat_GrSLType;
-        case kVec2s_GrVertexAttribType:
+        case kVec2us_GrVertexAttribType:
         case kVec2f_GrVertexAttribType:
             return kVec2f_GrSLType;
         case kVec3f_GrVertexAttribType: