<webview>: Move back, forward, canGoBack, canGoForward, go from content to chrome

content/renderer/browser_plugin/browser_plugin.cc

 // Copyright 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 "content/renderer/browser_plugin/browser_plugin.h"
 
 #include "base/command_line.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/message_loop.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 109 matching lines @@
       guest_crashed_(false),
       auto_size_ack_pending_(false),
       persist_storage_(false),
       valid_partition_id_(true),
       content_window_routing_id_(MSG_ROUTING_NONE),
       plugin_focused_(false),
       visible_(true),
       size_changed_in_flight_(false),
       before_first_navigation_(true),
       browser_plugin_manager_(render_view->GetBrowserPluginManager()),
-      current_nav_entry_index_(0),
-      nav_entry_count_(0),
       compositing_enabled_(false),
       weak_ptr_factory_(this) {
 }
 
 BrowserPlugin::~BrowserPlugin() {
   // If the BrowserPlugin has never navigated then the browser process and
   // BrowserPluginManager don't know about it and so there is nothing to do
   // here.
   if (!HasGuestInstanceID())
     return;
@@ skipping 425 matching lines @@
 }
 
 void BrowserPlugin::OnLoadCommit(
     int guest_instance_id,
     const BrowserPluginMsg_LoadCommit_Params& params) {
   // If the guest has just committed a new navigation then it is no longer
   // crashed.
   guest_crashed_ = false;
   if (params.is_top_level)
     UpdateDOMAttribute(browser_plugin::kAttributeSrc, params.url.spec());
-
-  current_nav_entry_index_ = params.current_entry_index;
-  nav_entry_count_ = params.entry_count;
 }
 
 void BrowserPlugin::OnLoadHandlerCalled(int guest_instance_id) {
   TriggerEvent(browser_plugin::kEventContentLoad, NULL);
 }
 
 void BrowserPlugin::OnLoadRedirect(int guest_instance_id,
                                    const GURL& old_url,
                                    const GURL& new_url,
                                    bool is_top_level) {
@@ skipping 281 matching lines @@
 }
 
 bool BrowserPlugin::HasNavigated() const {
   return !before_first_navigation_;
 }
 
 bool BrowserPlugin::HasGuestInstanceID() const {
   return guest_instance_id_ != browser_plugin::kInstanceIDNone;
 }
 
-bool BrowserPlugin::CanGoBack() const {
-  return nav_entry_count_ > 1 && current_nav_entry_index_ > 0;
-}
-
-bool BrowserPlugin::CanGoForward() const {
-  return current_nav_entry_index_ >= 0 &&
-      current_nav_entry_index_ < (nav_entry_count_ - 1);
-}
-
 bool BrowserPlugin::ParsePartitionAttribute(std::string* error_message) {
   if (HasNavigated()) {
     *error_message = browser_plugin::kErrorAlreadyNavigated;
     return false;
   }
 
   std::string input = GetPartitionAttribute();
 
   // Since the "persist:" prefix is in ASCII, StartsWith will work fine on
   // UTF-8 encoded |partition_id|. If the prefix is a match, we can safely
@@ skipping 148 matching lines @@
     // Note that we are using weak pointer for the following PostTask, so we
     // don't need to worry about BrowserPlugin going away.
     base::MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(&BrowserPlugin::OnRequestObjectGarbageCollected,
                    plugin,
                    request_id));
   }
 }
 
-void BrowserPlugin::Back() {
-  if (!HasGuestInstanceID())
-    return;
-  browser_plugin_manager()->Send(
-      new BrowserPluginHostMsg_Go(render_view_routing_id_,
-                                  guest_instance_id_, -1));
-}
-
-void BrowserPlugin::Forward() {
-  if (!HasGuestInstanceID())
-    return;
-  browser_plugin_manager()->Send(
-      new BrowserPluginHostMsg_Go(render_view_routing_id_,
-                                  guest_instance_id_, 1));
-}
-
-void BrowserPlugin::Go(int relative_index) {
-  if (!HasGuestInstanceID())
-    return;
-  browser_plugin_manager()->Send(
-      new BrowserPluginHostMsg_Go(render_view_routing_id_,
-                                  guest_instance_id_,
-                                  relative_index));
-}
-
 void BrowserPlugin::TerminateGuest() {
   if (!HasGuestInstanceID() || guest_crashed_)
     return;
   browser_plugin_manager()->Send(
       new BrowserPluginHostMsg_TerminateGuest(render_view_routing_id_,
                                               guest_instance_id_));
 }
 
 void BrowserPlugin::Stop() {
   if (!HasGuestInstanceID())
@@ skipping 533 matching lines @@
     const WebKit::WebMouseEvent& event) {
   browser_plugin_manager()->Send(
       new BrowserPluginHostMsg_HandleInputEvent(render_view_routing_id_,
                                                 guest_instance_id_,
                                                 plugin_rect_,
                                                 &event));
   return true;
 }
 
 }  // namespace content