Move BrowserThread to content namespace.

TBR=owners
BUG=98716

Review URL: http://codereview.chromium.org/8437002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108270 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/shell_integration_linux.cc b/chrome/browser/shell_integration_linux.cc
index f6787fb..4ec3e027 100644
--- a/chrome/browser/shell_integration_linux.cc
+++ b/chrome/browser/shell_integration_linux.cc
@@ -38,6 +38,8 @@
 #include "googleurl/src/gurl.h"
 #include "ui/gfx/codec/png_codec.h"
 
+using content::BrowserThread;
+
 namespace {
 
 // Helper to launch xdg scripts. We don't want them to ask any questions on the