add chrome depot tools in ./Chromium/depot_tools

Chromium must have been compiled first in order to compile Awesomium.
Download http://src.chromium.org/svn/trunk/tools/depot_tools.zip
Unzip to ./Chromium/depot_tools
Add to PATH
Go to chromium/depot_tools and run gclient one time (download svn and python):
>> gclient
go to Chromium dir, and run:
>> gclient config http://src.chromium.org/svn/releases/4.1.249.1036
>> gclient sync
Notice that you'll need MSWindow SDK v7.1 in order to compile Chromium. Verify in MSVC option that the directories to MSWindow SDK are correctly setted.
Then, launch "Chromium/Build/all.sln", and build Debug and Release version (Be patient, several hours of compilation...).
Then, launch "ChOR.sln", and again, build debug and release version. Do not notice if PyAwesomium project fail to compile, as we don't use it.
Done!