Support querying if a vertex attribute is an un-normalized integer.

src/libGLESv2/VertexAttribute.h

@@ -77,6 +77,8 @@ class VertexAttribute
             return static_cast<T>(mBoundBuffer.id());
           case GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
             return static_cast<T>(mDivisor);
+          case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
+            return static_cast<T>(mPureInteger ? GL_TRUE : GL_FALSE);
           default:
             UNREACHABLE();
             return static_cast<T>(0);

src/libGLESv2/libGLESv2.cpp

@@ -1942,6 +1942,9 @@ bool validateGetVertexAttribParameters(GLenum pname, int clientVersion)
         META_ASSERT(GL_VERTEX_ATTRIB_ARRAY_DIVISOR == GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE);
         return true;
 
+      case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
+        return ((clientVersion >= 3) ? true : gl::error(GL_INVALID_ENUM, false));
+
       default:
         return gl::error(GL_INVALID_ENUM, false);
     }