Move remaining content test code into the content namespace.

content/public/test/web_contents_tester.cc

Index: content/public/test/web_contents_tester.cc
===================================================================
--- content/public/test/web_contents_tester.cc	(revision 164732)
+++ content/public/test/web_contents_tester.cc	(working copy)
@@ -15,7 +15,7 @@
 
 class TestWebContentsCountFocus : public TestWebContents {
  public:
-  explicit TestWebContentsCountFocus(content::BrowserContext* browser_context)
+  explicit TestWebContentsCountFocus(BrowserContext* browser_context)
       : TestWebContents(browser_context), focus_called_(0) {
   }
 
@@ -34,7 +34,7 @@
 class TestWebContentsCountSetFocusToLocationBar : public TestWebContents {
  public:
   explicit TestWebContentsCountSetFocusToLocationBar(
-      content::BrowserContext* browser_context)
+      BrowserContext* browser_context)
       : TestWebContents(browser_context), focus_called_(0) {
   }