content/browser: Move more files into the content namespace.

content/browser/cross_site_request_manager.h

Index: content/browser/cross_site_request_manager.h
diff --git a/content/browser/cross_site_request_manager.h b/content/browser/cross_site_request_manager.h
index cecfc930190c19a4aba6902d47ff9ec034f07e81..5b0f210c01171a1985bc32b60b1180f4a1cd5b8e 100644
--- a/content/browser/cross_site_request_manager.h
+++ b/content/browser/cross_site_request_manager.h
@@ -13,6 +13,8 @@
 
 template <typename T> struct DefaultSingletonTraits;
 
+namespace content {
+
 // CrossSiteRequestManager is used to handle bookkeeping for cross-site
 // requests and responses between the UI and IO threads.  Such requests involve
 // a transition from one RenderViewHost to another within WebContentsImpl, and
@@ -56,4 +58,6 @@ class CrossSiteRequestManager {
   DISALLOW_COPY_AND_ASSIGN(CrossSiteRequestManager);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_BROWSER_CROSS_SITE_REQUEST_MANAGER_H_