Relanding the language detection.

chrome/browser/renderer_host/browser_render_process_host.cc

Index: chrome/browser/renderer_host/browser_render_process_host.cc
===================================================================
--- chrome/browser/renderer_host/browser_render_process_host.cc	(revision 35721)
+++ chrome/browser/renderer_host/browser_render_process_host.cc	(working copy)
@@ -735,10 +735,9 @@
 void BrowserRenderProcessHost::OnMessageReceived(const IPC::Message& msg) {
   mark_child_process_activity_time();
   if (msg.routing_id() == MSG_ROUTING_CONTROL) {
-    // dispatch control messages
+    // Dispatch control messages.
     bool msg_is_ok = true;
     IPC_BEGIN_MESSAGE_MAP_EX(BrowserRenderProcessHost, msg, msg_is_ok)
-      IPC_MESSAGE_HANDLER(ViewHostMsg_PageContents, OnPageContents)
       IPC_MESSAGE_HANDLER(ViewHostMsg_UpdatedCacheStats,
                           OnUpdatedCacheStats)
       IPC_MESSAGE_HANDLER(ViewHostMsg_SuddenTerminationChanged,
@@ -762,7 +761,7 @@
     return;
   }
 
-  // dispatch incoming messages to the appropriate TabContents
+  // Dispatch incoming messages to the appropriate TabContents.
   IPC::Channel::Listener* listener = GetListenerByID(msg.routing_id());
   if (!listener) {
     if (msg.is_sync()) {
@@ -836,18 +835,6 @@
   // TODO(darin): clean this up
 }
 
-void BrowserRenderProcessHost::OnPageContents(const GURL& url,
-                                              int32 page_id,
-                                              const std::wstring& contents) {
-  Profile* p = profile();
-  if (!p || p->IsOffTheRecord())
-    return;
-
-  HistoryService* hs = p->GetHistoryService(Profile::IMPLICIT_ACCESS);
-  if (hs)
-    hs->SetPageContents(url, contents);
-}
-
 void BrowserRenderProcessHost::OnUpdatedCacheStats(
     const WebCache::UsageStats& stats) {
   WebCacheManager::GetInstance()->ObserveStats(id(), stats);