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

content/browser/resolve_proxy_msg_helper.cc

Index: content/browser/resolve_proxy_msg_helper.cc
diff --git a/content/browser/resolve_proxy_msg_helper.cc b/content/browser/resolve_proxy_msg_helper.cc
index 56b4047ecc3cdcc2cec05775ec5329fd217096be..52d0987edb947295289d03c21f18725c0a692c59 100644
--- a/content/browser/resolve_proxy_msg_helper.cc
+++ b/content/browser/resolve_proxy_msg_helper.cc
@@ -12,6 +12,8 @@
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 
+namespace content {
+
 ResolveProxyMsgHelper::ResolveProxyMsgHelper(
     net::URLRequestContextGetter* getter)
     : context_getter_(getter),
@@ -97,3 +99,5 @@ void ResolveProxyMsgHelper::StartPendingRequest() {
   if (result != net::ERR_IO_PENDING)
     OnResolveProxyCompleted(result);
 }
+
+}  // namespace content