Clean up TCW, make it solely a hub for 1:1 observer/helper objects.

chrome/browser/tabs/pinned_tab_codec.cc

Index: chrome/browser/tabs/pinned_tab_codec.cc
diff --git a/chrome/browser/tabs/pinned_tab_codec.cc b/chrome/browser/tabs/pinned_tab_codec.cc
index cb3c7f7a3d5f37260e1129c3010a5269878602b3..eaa02da1452d6a7442f428d0ad96b13c00a64740 100644
--- a/chrome/browser/tabs/pinned_tab_codec.cc
+++ b/chrome/browser/tabs/pinned_tab_codec.cc
@@ -53,9 +53,10 @@ static void EncodePinnedTab(TabStripModel* model,
     value->SetString(kURL, extension->GetFullLaunchURL().spec());
     values->Append(value.release());
   } else {
-    NavigationEntry* entry = tab_contents->controller().GetActiveEntry();
-    if (!entry && tab_contents->controller().entry_count())
-      entry = tab_contents->controller().GetEntryAtIndex(0);
+    NavigationEntry* entry =
+        tab_contents->tab_contents()->controller().GetActiveEntry();
+    if (!entry && tab_contents->tab_contents()->controller().entry_count())
+      entry = tab_contents->tab_contents()->controller().GetEntryAtIndex(0);
     if (entry) {
       value->SetString(kURL, entry->url().spec());
       values->Append(value.release());