Make base compile with no "using base::FilePath".

Make base compile with no "using base::FilePath".

For base .cc files not using the base namespace, I added a using since theses
files should be moved to the base namespace, and then explicit qualification
will no longer be necessary.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=182032

[brettw, 2013-02-12 22:03:33]

TBR=jar

[jar (doing other things), 2013-02-13 03:15:56]

LGTM (nit below might go into different CL).

https://codereview.chromium.org/12226121/diff/9002/base/nix/mime_util_xdg.cc
File base/nix/mime_util_xdg.cc (right):

https://codereview.chromium.org/12226121/diff/9002/base/nix/mime_util_xdg.cc#...
base/nix/mime_util_xdg.cc:519: desktop_env ==
base::nix::DESKTOP_ENVIRONMENT_KDE4) {
nit: perhaps the base::nix on the above 4 lines, and down on line 529, should go
away now.

Also, I was a little scared about inadvertent use of these namespace qualifiers
in the other mentioned functions here.

Is there a nice way to be sure the change is safe? (pushing all this into the
base::nix namespace)

[brettw, 2013-02-13 20:45:34]

https://codereview.chromium.org/12226121/diff/9002/base/nix/mime_util_xdg.cc
File base/nix/mime_util_xdg.cc (right):

https://codereview.chromium.org/12226121/diff/9002/base/nix/mime_util_xdg.cc#...
base/nix/mime_util_xdg.cc:519: desktop_env ==
base::nix::DESKTOP_ENVIRONMENT_KDE4) {
I'll fix the extra "base::" and do a new patch. I had to revert this because I
messed up something on Windows.