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 e715ab7dbd9d8cb350e25257e39c490db115f3eb..6e4ec85c88cc52d5962b2510d38aeb418b1481a7 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.cc
+++ b/gpu/command_buffer/common/gles2_cmd_utils.cc
@@ -313,7 +313,7 @@ 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:
@@ -328,6 +328,10 @@ 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: