Re-factor location bar/toolbar code to get rid of the browser dependency.

chrome/browser/ui/browser_toolbar_model_host.cc

Index: chrome/browser/ui/browser_toolbar_model_host.cc
diff --git a/chrome/browser/ui/browser_toolbar_model_host.cc b/chrome/browser/ui/browser_toolbar_model_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..325625eb522deb43760696d82e70fc3c25f281ba
--- /dev/null
+++ b/chrome/browser/ui/browser_toolbar_model_host.cc
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/browser_toolbar_model_host.h"
+
+#include "chrome/browser/ui/browser.h"
+
+BrowserToolbarModelHost::BrowserToolbarModelHost(Browser* browser)
+    : browser_(browser) {
+}
+
+BrowserToolbarModelHost::~BrowserToolbarModelHost() {
+}
+
+content::WebContents* BrowserToolbarModelHost::GetActiveWebContents() const {
+  return browser_->GetSelectedWebContents();
+}