Create CoreTabHelper, move remaining core TCW functionality into it.

chrome/browser/ui/pdf/pdf_tab_observer.cc

+// Copyright (c) 2011 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/pdf/pdf_tab_observer.h"
+
+#include "chrome/browser/ui/pdf/pdf_unsupported_feature.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/common/render_messages.h"
+
+PDFTabObserver::PDFTabObserver(TabContentsWrapper* wrapper)
+    : TabContentsObserver(wrapper->tab_contents()),
+      wrapper_(wrapper) {
+}
+
+PDFTabObserver::~PDFTabObserver() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TabContentsObserver overrides
+
+bool PDFTabObserver::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PDFTabObserver, message)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PDFHasUnsupportedFeature,
+                        OnPDFHasUnsupportedFeature)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Internal helpers
+
+void PDFTabObserver::OnPDFHasUnsupportedFeature() {
+  PDFHasUnsupportedFeature(wrapper_);
+}