WebGL 2: Fix nits when check vertexAttrib type with variable type in vertex shader

gpu/command_buffer/service/context_state.cc

Index: gpu/command_buffer/service/context_state.cc
diff --git a/gpu/command_buffer/service/context_state.cc b/gpu/command_buffer/service/context_state.cc
index e1dc82f1d623a424471f1ad5892d3767619b2721..ce03cbdf9ae95c00cb5dfebed2984cdb523c8013 100644
--- a/gpu/command_buffer/service/context_state.cc
+++ b/gpu/command_buffer/service/context_state.cc
@@ -222,12 +222,9 @@ ContextState::ContextState(FeatureInfo* feature_info,
       ignore_cached_state(false),
       fbo_binding_for_scissor_workaround_dirty(false),
       framebuffer_srgb_(false),
+      max_vertex_attribs_(0),
       feature_info_(feature_info),
       error_state_(ErrorState::Create(error_state_client, logger)) {
-  max_vertex_attribs_ = 0;
-  generic_attrib_base_type_mask_.resize(1);
-  generic_attrib_base_type_mask_[0] = 0xFFFFFFFF;
-
   Initialize();
 }