Implemented the undo translation in the renderer.

This reverts the page's text to its original (pre-translation) value. 

BUG=None 
TEST=None 

Review http://codereview.chromium.org/554104/show

Review URL: http://codereview.chromium.org/555175

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37583 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 0 deletions

diff --git a/chrome/renderer/render_view.cc b/chrome/renderer/render_view.cc
index a27792f4..48e5ebf 100644
--- a/chrome/renderer/render_view.cc
+++ b/chrome/renderer/render_view.cc
@@ -1146,6 +1146,9 @@ void RenderView::UpdateURL(WebFrame* frame) {
       host_zoom_levels_.erase(host);
     }
 
+    // Drop the translated nodes.
+    page_translator_->NavigatedToNewPage();
+
     // Update contents MIME type for main frame.
     params.contents_mime_type = ds->response().mimeType().utf8();
 
@@ -3333,6 +3336,13 @@ void RenderView::OnTranslateTextResponse(
   text_translator_.OnTranslationResponse(work_id, error_id, text_chunks);
 }
 
+void RenderView::OnUndoTranslate(int page_id) {
+  if (page_id != page_id_)
+    return;  // Not the page we expected, nothing to do.
+
+  page_translator_->UndoTranslation();
+}
+
 void RenderView::OnInstallMissingPlugin() {
   // This could happen when the first default plugin is deleted.
   if (first_default_plugin_)