Consolidate varying packing sort order methods.

We were using the same list in the shader varying sorting
as well as in the varying packing validation in the
translator.

BUG=angle:466

Change-Id: Ic11758288e7a522d7c18a293de9e137e487e3978
Reviewed-on: https://chromium-review.googlesource.com/205595
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
diff --git a/src/compiler/translator/VariablePacker.cpp b/src/compiler/translator/VariablePacker.cpp
index 7186cb9..c687677 100644
--- a/src/compiler/translator/VariablePacker.cpp
+++ b/src/compiler/translator/VariablePacker.cpp
@@ -9,52 +9,6 @@
 
 #include <algorithm>
 
-namespace
-{
-
-int GetSortOrder(sh::GLenum type)
-{
-    switch (type) {
-        case GL_FLOAT_MAT4:
-        case GL_FLOAT_MAT2x4:
-        case GL_FLOAT_MAT3x4:
-        case GL_FLOAT_MAT4x2:
-        case GL_FLOAT_MAT4x3:
-            return 0;
-        case GL_FLOAT_MAT2:
-            return 1;
-        case GL_FLOAT_VEC4:
-        case GL_INT_VEC4:
-        case GL_BOOL_VEC4:
-            return 2;
-        case GL_FLOAT_MAT3:
-        case GL_FLOAT_MAT2x3:
-        case GL_FLOAT_MAT3x2:
-            return 3;
-        case GL_FLOAT_VEC3:
-        case GL_INT_VEC3:
-        case GL_BOOL_VEC3:
-            return 4;
-        case GL_FLOAT_VEC2:
-        case GL_INT_VEC2:
-        case GL_BOOL_VEC2:
-            return 5;
-        case GL_FLOAT:
-        case GL_INT:
-        case GL_BOOL:
-        case GL_SAMPLER_2D:
-        case GL_SAMPLER_CUBE:
-        case GL_SAMPLER_EXTERNAL_OES:
-        case GL_SAMPLER_2D_RECT_ARB:
-            return 6;
-        default:
-            ASSERT(false);
-            return 7;
-    }
-}
-
-}    // namespace
-
 int VariablePacker::GetNumComponentsPerRow(sh::GLenum type)
 {
     switch (type)
@@ -111,11 +65,12 @@
     }
 }
 
-struct TVariableInfoComparer {
+struct TVariableInfoComparer
+{
     bool operator()(const TVariableInfo& lhs, const TVariableInfo& rhs) const
     {
-        int lhsSortOrder = GetSortOrder(lhs.type);
-        int rhsSortOrder = GetSortOrder(rhs.type);
+        int lhsSortOrder = gl::VariableSortOrder(lhs.type);
+        int rhsSortOrder = gl::VariableSortOrder(rhs.type);
         if (lhsSortOrder != rhsSortOrder) {
             return lhsSortOrder < rhsSortOrder;
         }