Run ContentMain in a browser_test's browser process. This removes duplication of code in the browse…

chrome/browser/extensions/api/socket/socket_apitest.cc

Index: chrome/browser/extensions/api/socket/socket_apitest.cc
===================================================================
--- chrome/browser/extensions/api/socket/socket_apitest.cc	(revision 257432)
+++ chrome/browser/extensions/api/socket/socket_apitest.cc	(working copy)
@@ -73,7 +73,11 @@
     // going to move the Pepper API tests to a new place, use a string literal
     // for now.
     command_line->AppendSwitch("enable-pepper-testing");
+  }
 
+  virtual void SetUpOnMainThread() OVERRIDE {
+    SocketApiTest::SetUpOnMainThread();
+
     PathService::Get(chrome::DIR_GEN_TEST_DATA, &app_dir_);
     app_dir_ = app_dir_.AppendASCII("ppapi/tests/extensions/socket/newlib");
   }