[Refactoring] Extracted SpellCheckProfile from ProfileImpl.

Extracted
- ProfileImpl::spellcheck_host_ready
- ProfileImpl::spellcheck_host_
- ProfileImpl::spellcheck_host_metrics_
into newly created SpellCheckProfile.
This is a preparation for implementing SyncableService.

TEST=SpellCheckProfileTest.*
BUG=none


Review URL: http://codereview.chromium.org/7583003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96135 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 10546bd..0a22eeb 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -2004,6 +2004,8 @@
         'browser/spellchecker/spellcheck_host_metrics.h',
         'browser/spellchecker/spellcheck_message_filter.cc',
         'browser/spellchecker/spellcheck_message_filter.h',
+        'browser/spellchecker/spellcheck_profile.cc',
+        'browser/spellchecker/spellcheck_profile.h',
         'browser/spellchecker/spellchecker_linux.cc',
         'browser/spellchecker/spellchecker_mac.mm',
         'browser/spellchecker/spellchecker_platform_engine.h',