Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/common/database_util.h

Index: content/common/database_util.h
===================================================================
--- content/common/database_util.h	(revision 163290)
+++ content/common/database_util.h	(working copy)
@@ -7,6 +7,7 @@
 
 #include "webkit/glue/webkitplatformsupport_impl.h"
 
+namespace content {
 // A class of utility functions used by RendererWebKitPlatformSupportImpl and
 // WorkerWebKitPlatformSupportImpl to handle database file accesses.
 class DatabaseUtil {
@@ -23,4 +24,6 @@
       const WebKit::WebString& origin_identifier);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_COMMON_DATABASE_UTIL_H_