Minor C++ fixes found by Clang.

webkit/tools/test_shell/test_shell_switches.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/tools/test_shell/test_shell_switches.h"
 
 namespace test_shell {
 
 // Suppresses all error dialogs when present.
 const char kNoErrorDialogs[]                = "noerrdialogs";
@@ skipping 54 matching lines @@
 
 // Enable tracing events (see base/trace_event.h)
 const char kEnableTracing[] = "enable-tracing";
 
 // Allow scripts to close windows in all cases.
 const char kAllowScriptsToCloseWindows[] = "allow-scripts-to-close-windows";
 
 // Test the system dependencies (themes, fonts, ...). When this flag is
 // specified, the test shell will exit immediately with either 0 (success) or
 // 1 (failure). Combining with other flags has no effect.
-extern const char kCheckLayoutTestSystemDeps[] =
-    "check-layout-test-sys-deps";
+const char kCheckLayoutTestSystemDeps[] = "check-layout-test-sys-deps";
 
 // If set, we are running under GDB so allow a certain class of errors
 // to happen even if in layout test mode.
-extern const char kGDB[] = "gdb";
+const char kGDB[] = "gdb";
 
 // Make functions of the Profiler class available in javascript
-extern const char kProfiler[] = "profiler";
+const char kProfiler[] = "profiler";
 
 // Make functions of the HeapProfiler class available in javascript
-extern const char kHeapProfiler[] = "heap-profiler";
+const char kHeapProfiler[] = "heap-profiler";
 
 }  // namespace test_shell