Move CommandLine to base namespace.

extensions/browser/extensions_browser_client.h

Index: extensions/browser/extensions_browser_client.h
diff --git a/extensions/browser/extensions_browser_client.h b/extensions/browser/extensions_browser_client.h
index dea7d7f9017ff687647cb2b16ae09651ec1ae880..b994cca94cc83f90ebc35c7640460246af104162 100644
--- a/extensions/browser/extensions_browser_client.h
+++ b/extensions/browser/extensions_browser_client.h
@@ -10,10 +10,13 @@
 
 #include "base/memory/scoped_ptr.h"
 
-class CommandLine;
 class ExtensionFunctionRegistry;
 class PrefService;
 
+namespace base {
+class CommandLine;
+}
+
 namespace content {
 class BrowserContext;
 class JavaScriptDialogManager;
@@ -44,7 +47,7 @@ class ExtensionsBrowserClient {
 
   // Returns true if extensions have been disabled (e.g. via a command-line flag
   // or preference).
-  virtual bool AreExtensionsDisabled(const CommandLine& command_line,
+  virtual bool AreExtensionsDisabled(const base::CommandLine& command_line,
                                      content::BrowserContext* context) = 0;
 
   // Returns true if the |context| is known to the embedder.