Fixes bug in instant that resulted in flickery fade. The problem would

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

 // Copyright (c) 2010 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.
 
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 
 #include "app/l10n_util_mac.h"
 #include "app/resource_bundle.h"
 #include "base/nsimage_cache_mac.h"
 #include "base/stl_util-inl.h"
@@ skipping 215 matching lines @@
   SetSuggestedText(string16());
 }
 
 void LocationBarViewMac::OnAutocompleteLosingFocus(gfx::NativeView unused) {
   SetSuggestedText(string16());
 
   InstantController* instant = browser_->instant();
   if (!instant)
     return;
 
-  if (!instant->is_active() || !instant->GetPreviewContents())
-    return;
-
   // If |IsMouseDownFromActivate()| returns false, the RenderWidgetHostView did
   // not receive a mouseDown event.  Therefore, we should destroy the preview.
   // Otherwise, the RWHV was clicked, so we commit the preview.
-  if (!instant->IsMouseDownFromActivate())
+  if (!instant->is_displayable() || !instant->GetPreviewContents() ||
+      !instant->IsMouseDownFromActivate()) {
     instant->DestroyPreviewContents();
-  else if (instant->IsShowingInstant())
+  } else if (instant->IsShowingInstant()) {
     instant->SetCommitOnMouseUp();
-  else
+  } else {
     instant->CommitCurrentPreview(INSTANT_COMMIT_FOCUS_LOST);
+  }
 }
 
 void LocationBarViewMac::OnAutocompleteWillAccept() {
   update_instant_ = false;
 }
 
 bool LocationBarViewMac::OnCommitSuggestedText(const std::wstring& typed_text) {
   return edit_view_->CommitSuggestText();
 }
 
@@ skipping 426 matching lines @@
 
   // These need to change anytime the layout changes.
   // TODO(shess): Anytime the field editor might have changed, the
   // cursor rects almost certainly should have changed.  The tooltips
   // might change even when the rects don't change.
   [field_ resetFieldEditorFrameIfNeeded];
   [field_ updateCursorAndToolTipRects];
 
   [field_ setNeedsDisplay:YES];
 }