Do not load extension system in the Profile import process.

content/public/test/test_launcher.cc

Index: content/public/test/test_launcher.cc
diff --git a/content/public/test/test_launcher.cc b/content/public/test/test_launcher.cc
index e1248296f3a9ea9c17181538138a07ce5d6b7c79..cccb55bc750ed556219ffd4939b259e75dbf9344 100644
--- a/content/public/test/test_launcher.cc
+++ b/content/public/test/test_launcher.cc
@@ -637,8 +637,6 @@ const char kGTestOutputFlag[] = "gtest_output";
 
 const char kHelpFlag[]   = "help";
 
-const char kLaunchAsBrowser[] = "as-browser";
-
 // See kManualTestPrefix above.
 const char kRunManualTestsFlag[] = "run-manual";
 
@@ -654,7 +652,7 @@ bool ShouldRunContentMain() {
 #if defined(OS_WIN) || defined(OS_LINUX)
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(switches::kProcessType) ||
-         command_line->HasSwitch(kLaunchAsBrowser);
+         command_line->HasSwitch(switches::kLaunchAsBrowser);
 #else
   return false;
 #endif  // defined(OS_WIN) || defined(OS_LINUX)