5 files changed, 18 insertions, 23 deletions
diff --git a/chrome/browser/instant/instant_loader.cc b/chrome/browser/instant/instant_loader.cc
index e4ee07d..2bb01a0 100644
--- a/chrome/browser/instant/instant_loader.cc
+++ b/chrome/browser/instant/instant_loader.cc
@@ -373,6 +373,13 @@ class InstantLoader::TabContentsDelegateImpl
       loader_->PageDoesntSupportInstant(user_typed_before_load_);
   }
 
+  virtual bool ShouldShowHungRendererDialog() {
+    // If we allow the hung renderer dialog to be shown it'll gain focus,
+    // stealing focus from the omnibox causing instant to be cancelled. Return
+    // false so that doesn't happen.
+    return false;
+  }
+
  private:
   typedef std::vector<scoped_refptr<history::HistoryAddPageArgs> >
       AddPageVector;
diff --git a/chrome/browser/tab_contents/tab_contents.cc b/chrome/browser/tab_contents/tab_contents.cc
index ea76a4a..9c539b3 100644
--- a/chrome/browser/tab_contents/tab_contents.cc
+++ b/chrome/browser/tab_contents/tab_contents.cc
@@ -2849,8 +2849,10 @@ void TabContents::RendererUnresponsive(RenderViewHost* rvh,
     return;
   }
 
-  if (render_view_host() && render_view_host()->IsRenderViewLive())
+  if (render_view_host() && render_view_host()->IsRenderViewLive() &&
+      (!delegate() || delegate()->ShouldShowHungRendererDialog())) {
     hung_renderer_dialog::ShowForTabContents(this);
+  }
 }
 
 void TabContents::RendererResponsive(RenderViewHost* render_view_host) {
diff --git a/chrome/browser/tab_contents/tab_contents_delegate.cc b/chrome/browser/tab_contents/tab_contents_delegate.cc
index 987e620..facb87c 100644
--- a/chrome/browser/tab_contents/tab_contents_delegate.cc
+++ b/chrome/browser/tab_contents/tab_contents_delegate.cc
@@ -227,5 +227,9 @@ void TabContentsDelegate::OnInstantSupportDetermined(int32 page_id,
 void TabContentsDelegate::ContentRestrictionsChanged(TabContents* source) {
 }
 
+bool TabContentsDelegate::ShouldShowHungRendererDialog() {
+  return true;
+}
+
 TabContentsDelegate::~TabContentsDelegate() {
 }
diff --git a/chrome/browser/tab_contents/tab_contents_delegate.h b/chrome/browser/tab_contents/tab_contents_delegate.h
index 9b52e32..9fb6cc5 100644
--- a/chrome/browser/tab_contents/tab_contents_delegate.h
+++ b/chrome/browser/tab_contents/tab_contents_delegate.h
@@ -332,6 +332,9 @@ class TabContentsDelegate : public AutomationResourceRoutingDelegate {
   // changed.
   virtual void ContentRestrictionsChanged(TabContents* source);
 
+  // Returns true if the hung renderer dialog should be shown. Default is true.
+  virtual bool ShouldShowHungRendererDialog();
+
  protected:
   virtual ~TabContentsDelegate();
 };
diff --git a/chrome/browser/ui/views/hung_renderer_view.cc b/chrome/browser/ui/views/hung_renderer_view.cc
index cdd08af..2892589 100644
--- a/chrome/browser/ui/views/hung_renderer_view.cc
+++ b/chrome/browser/ui/views/hung_renderer_view.cc
@@ -72,13 +72,8 @@ HungPagesTableModel::~HungPagesTableModel() {
 }
 
 void HungPagesTableModel::InitForTabContents(TabContents* hung_contents) {
-  // TODO(sky): remove when figure out cause of 58853.
-  CHECK(hung_contents->render_view_host());
   tab_contentses_.clear();
   for (TabContentsIterator it; !it.done(); ++it) {
-    // TODO(sky): remove when figure out cause of 58853.
-    CHECK(it->render_view_host());
-    CHECK(hung_contents->render_view_host());
     if (it->GetRenderProcessHost() == hung_contents->GetRenderProcessHost())
       tab_contentses_.push_back(*it);
   }
@@ -194,9 +189,6 @@ class HungRendererDialogView : public views::View,
   // Whether or not we've created controls for ourself.
   bool initialized_;
 
-  // TODO(sky): remove when figure out cause of 58853.
-  bool preparing_to_show_;
-
   // An amusing icon image.
   static SkBitmap* frozen_icon_;
 
@@ -224,8 +216,7 @@ HungRendererDialogView::HungRendererDialogView()
       kill_button_(NULL),
       kill_button_container_(NULL),
       contents_(NULL),
-      initialized_(false),
-      preparing_to_show_(false) {
+      initialized_(false) {
   InitClass();
 }
 
@@ -235,8 +226,6 @@ HungRendererDialogView::~HungRendererDialogView() {
 
 void HungRendererDialogView::ShowForTabContents(TabContents* contents) {
   DCHECK(contents && window());
-  // TODO(sky): remove when figure out cause of 58853.
-  CHECK(contents->render_view_host());
   contents_ = contents;
 
   // Don't show the warning unless the foreground window is the frame, or this
@@ -250,18 +239,12 @@ void HungRendererDialogView::ShowForTabContents(TabContents* contents) {
   }
 
   if (!window()->IsActive()) {
-    // TODO(sky): remove when figure out cause of 58853.
-    CHECK(contents->render_view_host());
     volatile TabContents* passed_c = contents;
     volatile TabContents* this_contents = contents_;
-    preparing_to_show_ = true;
 
     gfx::Rect bounds = GetDisplayBounds(contents);
     window()->SetBounds(bounds, frame_hwnd);
 
-    preparing_to_show_ = false;
-    CHECK(contents->render_view_host());
-
     // We only do this if the window isn't active (i.e. hasn't been shown yet,
     // or is currently shown but deactivated for another TabContents). This is
     // because this window is a singleton, and it's possible another active
@@ -277,8 +260,6 @@ void HungRendererDialogView::EndForTabContents(TabContents* contents) {
   DCHECK(contents);
   if (contents_ && contents_->GetRenderProcessHost() ==
       contents->GetRenderProcessHost()) {
-    // TODO(sky): remove when figure out cause of 58853.
-    CHECK(!preparing_to_show_);
     window()->Close();
     // Since we're closing, we no longer need this TabContents.
     contents_ = NULL;
@@ -471,8 +452,6 @@ static HungRendererDialogView* CreateHungRendererDialogView() {
 namespace hung_renderer_dialog {
 
 void ShowForTabContents(TabContents* contents) {
-  // TODO(sky): remove when figure out cause of 58853.
-  CHECK(contents->render_view_host());
   if (!logging::DialogsAreSuppressed()) {
     if (!g_instance)
       g_instance = CreateHungRendererDialogView();