Pass a Code object to Assembler::(set_)target_address_at for use by ool constant pool.

Pass a Code object to Assembler::(set_)target_address_at for use by ool constant pool.

The ool constant pool will require a pointer to the code's constant pool when
updating or reading target addresses using set_target_address_at()
and target_address_at().

R=ulan@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=19825

[rmcilroy, 2014-03-07 18:53:44]

Part of the out-of-line constant pool change - PTAL.

[ulan, 2014-03-11 13:21:10]

lgtm

[rmcilroy, 2014-03-11 20:31:40]

Committed patchset #1 manually as r19825 (presubmit successful).