convert a bunch of DCHECKs to STATIC_ASSERT

convert a bunch of DCHECKs to STATIC_ASSERT

Committed: https://crrev.com/ff5444199a2a2cf1bc1ce68ce12a458beb90a6f5
Cr-Commit-Position: refs/heads/master@{#29825}

[Mostyn Bramley-Moore, 2015-07-22 19:33:09]

mostynb@opera.com changed reviewers:
+ rmcilroy@chromium.org

[Mostyn Bramley-Moore, 2015-07-22 19:37:53]

@rmcilroy: PTAL.

The ppc and x87 targets don't seem to build for me on master atm, and apparently
there is no mips64 target.  But all the other obvious targets build for me with
these changes.

[rmcilroy, 2015-07-23 09:38:37]

On 2015/07/22 19:37:53, Mostyn Bramley-Moore wrote:
> @rmcilroy: PTAL.
> 
> The ppc and x87 targets don't seem to build for me on master atm, and
apparently
> there is no mips64 target.  But all the other obvious targets build for me
with
> these changes.

ppc and x87 are maintained by IBM and Intel respectively so that sometimes
happens (no need to add changes on those platforms, they usually port any
changes to these arches themselves).

lgtm, thanks.

[Mostyn Bramley-Moore, 2015-07-23 22:40:12]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2015-07-23 22:40:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1251593009/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1251593009/20001

[commit-bot: I haz the power, 2015-07-23 22:43:33]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-23 22:43:34]

Try jobs failed on following builders:
  v8_android_arm_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_android_arm_compile_rel/...)
  v8_win64_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win64_rel/builds/6968)

[Mostyn Bramley-Moore, 2015-07-23 22:57:15]

The CQ bit was checked by mostynb@opera.com

[Mostyn Bramley-Moore, 2015-07-23 22:57:16]

The patchset sent to the CQ was uploaded after l-g-t-m from
rmcilroy@chromium.org
Link to the patchset: https://codereview.chromium.org/1251593009/#ps40001
(title: "add missing include")

[commit-bot: I haz the power, 2015-07-23 22:57:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1251593009/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1251593009/40001

[commit-bot: I haz the power, 2015-07-23 23:34:59]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-07-23 23:35:25]

Patchset 3 (id:??) landed as
https://crrev.com/ff5444199a2a2cf1bc1ce68ce12a458beb90a6f5
Cr-Commit-Position: refs/heads/master@{#29825}