Command buffer: Fix bugs for drawing when the type of vertex attrib is a packed type

gpu/command_buffer/service/vertex_attrib_manager.cc

Index: gpu/command_buffer/service/vertex_attrib_manager.cc
diff --git a/gpu/command_buffer/service/vertex_attrib_manager.cc b/gpu/command_buffer/service/vertex_attrib_manager.cc
index 5d87aea211d30b68feca861b2831f1ec8ecd9764..66986450334f1c58658280463ba10d1bf920fd1c 100644
--- a/gpu/command_buffer/service/vertex_attrib_manager.cc
+++ b/gpu/command_buffer/service/vertex_attrib_manager.cc
@@ -88,7 +88,7 @@ bool VertexAttrib::CanAccess(GLuint index) const {
   uint32_t usable_size = buffer_size - offset_;
   GLuint num_elements = usable_size / real_stride_ +
       ((usable_size % real_stride_) >=
-       (GLES2Util::GetGLTypeSizeForTexturesAndBuffers(type_) * size_) ? 1 : 0);
+       (GLES2Util::GetGroupSizeForBufferType(size_, type_)) ? 1 : 0);
   return index < num_elements;
 }