Move CommandLine to base namespace.

content/test/webrtc_content_browsertest_base.h

Index: content/test/webrtc_content_browsertest_base.h
diff --git a/content/test/webrtc_content_browsertest_base.h b/content/test/webrtc_content_browsertest_base.h
index 885b996d40f81449596da5587c9689af221da711..8d0112c9b1ad6518aed636a4d0c576f478b22a11 100644
--- a/content/test/webrtc_content_browsertest_base.h
+++ b/content/test/webrtc_content_browsertest_base.h
@@ -4,14 +4,16 @@
 
 #include "content/test/content_browser_test.h"
 
+namespace base {
 class CommandLine;
+}
 
 namespace content {
 
 // Contains stuff WebRTC browsertests have in common.
 class WebRtcContentBrowserTest: public ContentBrowserTest {
  public:
-  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE;
+  virtual void SetUpCommandLine(base::CommandLine* command_line) OVERRIDE;
   virtual void SetUp() OVERRIDE;
 
  protected: