Separate UnicodeCache out into an own file.

Separate UnicodeCache out into an own file.

This make inclusion of unicode-inl.h in object.h absolete. Now most
compilation units don't require that header. It also breaks a cycle
within declarations of the scanner.h header.

This tries to remove includes of "-inl.h" headers from normal ".h"
headers, thereby reducing the chance of any cyclic dependencies and
decreasing the average size of our compilation units.

Note that this change still leaves 3 violations of that rule in the
code, checked with the "tools/check-inline-includes.sh" tool.

R=yangguo@chromium.org

Committed: https://crrev.com/4e39437a027f62af700336421a5243fff9978d34
Cr-Commit-Position: refs/heads/master@{#30268}

[Yang, 2015-08-20 11:23:58]

On 2015/08/20 11:11:36, Michael Starzinger wrote:

lgtm.

[Michael Starzinger, 2015-08-20 11:28:32]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-08-20 11:28:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1287893006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1287893006/1

[commit-bot: I haz the power, 2015-08-20 11:47:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-20 11:47:18]

Patchset 1 (id:??) landed as
https://crrev.com/4e39437a027f62af700336421a5243fff9978d34
Cr-Commit-Position: refs/heads/master@{#30268}