Enable icu_use_data_file_flag on CrOS

1. Enable icu_use_data_file_flag on CrOS

2. Doing #1 led to a crash because GetStringUTF8 (that relies on ICU to determine whether the current UI language is RTL) is called before InitializeICU is called. Instead of using GetStringUTF8, get the string directly from the resource bundle because there's no need to adjust the string for the RTL locale in this particular case. 

Note to perf-sheriff : The size of chrome binary will be 10M smaller because the ICU data is now in a separate file (icudtl.dat) whose size is about 10M. 

BUG=72633
TEST=ui_base_unittests

Review URL: https://codereview.chromium.org/135963010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248325 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248326 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248326
Add MetaTagObserver for retrieving information about meta tags

Add an observer that grabs information about meta tags when the
page has finished loading.

BUG=332281

Review URL: https://codereview.chromium.org/139413006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248327 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248327