Update third_party/cld_2 to r163 for simplified headers

Update third_party/cld_2 to r163 for simplified headers

This change makes the CLD2 header files ok to use regardless of whether or not
the CLD2_DYNAMIC_MODE define is set when including them. No-op implementations
have been added to the C++ code in CLD2 for the cases where client code
incorrectly calls dynamic-mode methods with a non-dynamic build of the library.
This allows including projects (such as Chromium) to opt for runtime checks
instead of compile-time checks when dealing with CLD2, which in turn greatly
simplifies the build logic for code that depends on CLD2.

BUG=367239
TBR=toyoshim

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=285581

[Andrew Hayden (chromium.org), 2014-07-25 11:01:29]

See crbug/367239 for an explanation of why we are doing this.

[Andrew Hayden (chromium.org), 2014-07-25 12:36:35]

The CQ bit was checked by andrewhayden@chromium.org

[commit-bot: I haz the power, 2014-07-25 12:37:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/andrewhayden@chromium.org/422493002/1

[commit-bot: I haz the power, 2014-07-25 13:14:17]

Change committed as 285581

[Takashi Toyoshima, 2014-07-28 16:24:08]

lgtm