[gtk] tabcontents fade-out for instant.

chrome/browser/gtk/browser_window_gtk.cc

Index: chrome/browser/gtk/browser_window_gtk.cc
diff --git a/chrome/browser/gtk/browser_window_gtk.cc b/chrome/browser/gtk/browser_window_gtk.cc
index 25c8f12553786e0a893ea01a83222c4a97dc707b..9a86e94ba6656d85b0733c9e5300b5d38ca379b7 100644
--- a/chrome/browser/gtk/browser_window_gtk.cc
+++ b/chrome/browser/gtk/browser_window_gtk.cc
@@ -1109,12 +1109,18 @@ void BrowserWindowGtk::Paste() {
 }
 
 void BrowserWindowGtk::PrepareForInstant() {
-  // TODO: implement fade as done on windows.
+  TabContents* contents = contents_container_->GetTabContents();
+  if (contents)
+    contents->FadeForInstant();
 }
 
 void BrowserWindowGtk::ShowInstant(TabContents* preview_contents) {
   contents_container_->SetPreviewContents(preview_contents);
   MaybeShowBookmarkBar(false);
+
+  TabContents* contents = contents_container_->GetTabContents();
+  if (contents)
+    contents->CancelInstantFade();
 }
 
 void BrowserWindowGtk::HideInstant() {