Make TabContents own its infobar delegates....

chrome/browser/gtk/infobar_gtk.cc

Index: chrome/browser/gtk/infobar_gtk.cc
===================================================================
--- chrome/browser/gtk/infobar_gtk.cc	(revision 65711)
+++ chrome/browser/gtk/infobar_gtk.cc	(working copy)
@@ -40,7 +40,8 @@
     : container_(NULL),
       delegate_(delegate),
       theme_provider_(NULL),
-      arrow_model_(this) {
+      arrow_model_(this),
+      cached_infobar_type_(delegate->GetInfoBarType()) {
   // Create |hbox_| and pad the sides.
   hbox_ = gtk_hbox_new(FALSE, kElementPadding);
 
@@ -105,14 +106,12 @@
 }
 
 void InfoBar::AnimateClose() {
+  delegate_ = NULL;
   slide_widget_->Close();
 }
 
 void InfoBar::Close() {
-  if (delegate_) {
-    delegate_->InfoBarClosed();
-    delegate_ = NULL;
-  }
+  delegate_ = NULL;
   delete this;
 }
 
@@ -276,9 +275,10 @@
 }
 
 void InfoBar::OnCloseButton(GtkWidget* button) {
-  if (delegate_)
+  if (delegate_) {
     delegate_->InfoBarDismissed();
-  RemoveInfoBar();
+    RemoveInfoBar();
+  }
 }
 
 gboolean InfoBar::OnBackgroundExpose(GtkWidget* sender,
@@ -292,7 +292,7 @@
   cairo_pattern_t* pattern = cairo_pattern_create_linear(0, 0, 0, height);
 
   double top_r, top_g, top_b;
-  GetTopColor(delegate_->GetInfoBarType(), &top_r, &top_g, &top_b);
+  GetTopColor(cached_infobar_type_, &top_r, &top_g, &top_b);
   cairo_pattern_add_color_stop_rgb(pattern, 0.0, top_r, top_g, top_b);
 
   double bottom_r, bottom_g, bottom_b;
@@ -355,8 +355,9 @@
 
  private:
   static void OnLinkClick(GtkWidget* button, LinkInfoBar* link_info_bar) {
-    if (link_info_bar->delegate_->AsLinkInfoBarDelegate()->
-        LinkClicked(gtk_util::DispositionForCurrentButtonPressEvent())) {
+    if (link_info_bar->delegate_ &&
+        link_info_bar->delegate_->AsLinkInfoBarDelegate()->
+            LinkClicked(gtk_util::DispositionForCurrentButtonPressEvent())) {
       link_info_bar->RemoveInfoBar();
     }
   }
@@ -426,18 +427,18 @@
 }
 
 void ConfirmInfoBar::OnCancelButton(GtkWidget* widget) {
-  if (delegate_->AsConfirmInfoBarDelegate()->Cancel())
+  if (delegate_ && delegate_->AsConfirmInfoBarDelegate()->Cancel())
     RemoveInfoBar();
 }
 
 void ConfirmInfoBar::OnOkButton(GtkWidget* widget) {
-  if (delegate_->AsConfirmInfoBarDelegate()->Accept())
+  if (delegate_ && delegate_->AsConfirmInfoBarDelegate()->Accept())
     RemoveInfoBar();
 }
 
 void ConfirmInfoBar::OnLinkClicked(GtkWidget* widget) {
-  if (delegate_->AsConfirmInfoBarDelegate()->LinkClicked(
-          gtk_util::DispositionForCurrentButtonPressEvent())) {
+  if (delegate_ && delegate_->AsConfirmInfoBarDelegate()->LinkClicked(
+      gtk_util::DispositionForCurrentButtonPressEvent())) {
     RemoveInfoBar();
   }
 }