first-run: Move ShowFirstRunDialog() function to first_run_dialog.h

So first_run doesn't need to depend on chrome/browser/ui/.

BUG=79586
TEST=None

[email protected]

Review URL: http://codereview.chromium.org/6871032

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@82014 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 74dc26a2..5e10083 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1075,6 +1075,7 @@
         'browser/first_run/first_run.h',
         'browser/first_run/first_run_browser_process.cc',
         'browser/first_run/first_run_browser_process.h',
+        'browser/first_run/first_run_dialog.h',
         'browser/first_run/first_run_gtk.cc',
         'browser/first_run/first_run_import_observer.cc',
         'browser/first_run/first_run_import_observer.h',