Move remaining content test code into the content namespace.

content/test/layout_browsertest.h

Index: content/test/layout_browsertest.h
===================================================================
--- content/test/layout_browsertest.h	(revision 164732)
+++ content/test/layout_browsertest.h	(working copy)
@@ -7,12 +7,11 @@
 #include "content/test/content_browser_test.h"
 
 class GURL;
+namespace content {
 class LayoutTestHttpServer;
-namespace content {
 class WebKitTestController;
-}
 
-class InProcessBrowserLayoutTest : public content::ContentBrowserTest {
+class InProcessBrowserLayoutTest : public ContentBrowserTest {
  public:
   explicit InProcessBrowserLayoutTest(const FilePath& test_parent_dir,
                                       const FilePath& test_case_dir);
@@ -53,7 +52,9 @@
   int port_;  // -2 means no port.  -1 means random.
   scoped_ptr<LayoutTestHttpServer> test_http_server_;
 
-  scoped_ptr<content::WebKitTestController> test_controller_;
+  scoped_ptr<WebKitTestController> test_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessBrowserLayoutTest);
 };
+
+}  // namespace content