gpu: FBO must be incomplete if the attached texture is not cube complete.

gpu/command_buffer/service/texture_manager.cc

Index: gpu/command_buffer/service/texture_manager.cc
diff --git a/gpu/command_buffer/service/texture_manager.cc b/gpu/command_buffer/service/texture_manager.cc
index 41cf6a3e8c2fb1c61a963ee5d0ac51e73eb09601..5aebb8f643707e8797e954338e197e059224d8b7 100644
--- a/gpu/command_buffer/service/texture_manager.cc
+++ b/gpu/command_buffer/service/texture_manager.cc
@@ -442,10 +442,11 @@ Texture::TextureCompleteness Texture::GetTextureCompleteness() const {
   if (needs_mips) {
     if (!texture_2d_complete())
       return TEXTURE_INCOMPLETE;
-    if (target_ == GL_TEXTURE_CUBE_MAP && !cube_complete())
-      return TEXTURE_INCOMPLETE;
   }
 
+  if (target_ == GL_TEXTURE_CUBE_MAP && !cube_complete())
+    return TEXTURE_INCOMPLETE;
+
   bool is_npot_compatible = !needs_mips &&
       wrap_s_ == GL_CLAMP_TO_EDGE &&
       wrap_t_ == GL_CLAMP_TO_EDGE;