...its users, the "Negate", "Inc", and "Dec" bytecode handler
generators, to use subclassing and method overriding instead
of passing lambdas around.

Change-Id: Ib3febbb5cb2d763705f902d0324c11290e9513f7
Reviewed-on: https://chromium-review.googlesource.com/731616
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48845}