Upstream historical tab logic

chrome/browser/android/tab_state.cc

 // Copyright 2014 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/android/tab_state.h"
 
 #include <jni.h>
 #include <limits>
 #include <vector>
 
@@ skipping 533 matching lines @@
                                            jobject state,
                                            jint saved_state_version) {
   void* data = env->GetDirectBufferAddress(state);
   int size = env->GetDirectBufferCapacity(state);
   ScopedJavaLocalRef<jstring> result =
       WebContentsState::GetVirtualUrlFromByteBuffer(
           env, data, size, saved_state_version);
   return result.Release();
 }
 
+// Creates a historical tab entry from the serialized tab contents contained
+// within |state|.
+static void CreateHistoricalTab(JNIEnv* env,
+                                jclass clazz,
+                                jobject state,
+                                jint saved_state_version) {
+  scoped_ptr<WebContents> web_contents(
+      WebContentsState::RestoreContentsFromByteBuffer(env,
+                                                      clazz,
+                                                      state,
+                                                      saved_state_version,
+                                                      true));
+  if (web_contents.get())
+    TabAndroid::CreateHistoricalTabFromContents(web_contents.get());
+}
+
 bool RegisterTabState(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }