Add ES3 commands GetVertexAttribI{u}iv to GPU command buffer.

gpu/command_buffer/common/gles2_cmd_utils.cc

Index: gpu/command_buffer/common/gles2_cmd_utils.cc
diff --git a/gpu/command_buffer/common/gles2_cmd_utils.cc b/gpu/command_buffer/common/gles2_cmd_utils.cc
index 257758fec021a89e1ff17ca353a0eac775be5f3d..d58156f37e6cfd3469f4dc29f231f00ce4c160cd 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.cc
+++ b/gpu/command_buffer/common/gles2_cmd_utils.cc
@@ -329,7 +329,7 @@ int GLES2Util::GLGetNumValuesReturned(int id) const {
     case GL_TEXTURE_MAX_ANISOTROPY_EXT:
       return 1;
 
-    // -- glGetVertexAttribfv, glGetVertexAttribiv
+    // -- glGetVertexAttrib
     case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
       return 1;
     case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
@@ -344,6 +344,10 @@ int GLES2Util::GLGetNumValuesReturned(int id) const {
       return 1;
     case GL_CURRENT_VERTEX_ATTRIB:
       return 4;
+    case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
+      return 1;
+    case GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
+      return 1;
 
     // -- glGetSynciv
     case GL_OBJECT_TYPE: