Check layer is valid for framebuffer 3D texture attachments.

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index bb0de013a807c5b251740072bfe69d96cdd1afd2..7c40e2955315482d7b80d8427af59e7d65814c48 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -53,6 +53,12 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
     virtual bool IsRenderbuffer(
         Renderbuffer* renderbuffer) const = 0;
     virtual bool Is3D() const = 0;
+
+    // If it's a 3D texture attachment, return true if
+    // FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER is smaller than the number of
+    // layers in the texture.
+    virtual bool IsLayerValid() const = 0;
+
     virtual bool CanRenderTo(const FeatureInfo* feature_info) const = 0;
     virtual void DetachFromFramebuffer(Framebuffer* framebuffer) const = 0;
     virtual bool ValidForAttachmentType(GLenum attachment_type,