Remove PrefObserver usages, batch 10.

chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc

Index: chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
diff --git a/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc b/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
index 2bdebb0c996c202b4c69a5de867df2cf22134a30..7eef1f872375fbdaa5b76da3c53ee7c00a60f5dd 100644
--- a/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
+++ b/chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc
@@ -177,7 +177,10 @@ BrowserTabStripController::BrowserTabStripController(Browser* browser,
   model_->AddObserver(this);
 
   local_pref_registrar_.Init(g_browser_process->local_state());
-  local_pref_registrar_.Add(prefs::kTabStripLayoutType, this);
+  local_pref_registrar_.Add(
+      prefs::kTabStripLayoutType,
+      base::Bind(&BrowserTabStripController::UpdateLayoutType,
+                 base::Unretained(this)));
 }
 
 BrowserTabStripController::~BrowserTabStripController() {
@@ -432,17 +435,6 @@ void BrowserTabStripController::TabBlockedStateChanged(WebContents* contents,
   SetTabDataAt(contents, model_index);
 }
 
-////////////////////////////////////////////////////////////////////////////////
-// BrowserTabStripController, content::NotificationObserver implementation:
-
-void BrowserTabStripController::OnPreferenceChanged(
-    PrefServiceBase* service,
-    const std::string& pref_name) {
-  if (pref_name == prefs::kTabStripLayoutType) {
-    UpdateLayoutType();
-  }
-}
-
 void BrowserTabStripController::SetTabRendererDataFromModel(
     WebContents* contents,
     int model_index,