Load devtools files from resources.pak rather than from disk.

This change merges devtools_resources.pak into resources.pak and
puts the code to load files from disk behind a command line switch.
If --debug-devtools is passed on the command line, we enable the code
to load from disk (so the developer can make changes to the .js
files without having to recompile or restart the browser).

I also tried to make sure we no longer include the resources directory
in release packages, but I probably missed something.

BUG=35793

Review URL: http://codereview.chromium.org/6670072

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@78949 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed