Move a bunch of code in content\renderer to the content namespace.

content/renderer/load_progress_tracker.cc

Index: content/renderer/load_progress_tracker.cc
===================================================================
--- content/renderer/load_progress_tracker.cc	(revision 163007)
+++ content/renderer/load_progress_tracker.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "content/common/view_messages.h"
 #include "content/renderer/render_view_impl.h"
 
+namespace content {
 namespace {
 
 const int kMinimumDelayBetweenUpdatesMS = 100;
@@ -87,3 +88,5 @@
   weak_factory_.InvalidateWeakPtrs();
   last_time_progress_sent_ = base::TimeTicks();
 }
+
+}  // namespace content