Fix spurious visibility events when committing Instant.

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
index 88810a5f244814cc899e3b47a57a67c720910723..baca15333ece1fbe4b391b1b4066f41b5c8bfd52 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
@@ -1208,8 +1208,6 @@ private:
   // for layout.
   availableResizeWidth_ = kUseFullAvailableWidth;
 
-  [delegate_ onInsertTabWithContents:contents->web_contents()];
-
   // We don't need to call |-layoutTabs| if the tab will be in the foreground
   // because it will get called when the new tab is selected by the tab model.
   // Whenever |-layoutTabs| is called, it'll also add the new subview.
@@ -1306,8 +1304,6 @@ private:
   // Bye bye, |oldController|.
   [tabContentsArray_ replaceObjectAtIndex:index withObject:newController];
 
-  [delegate_ onReplaceTabWithContents:newContents->web_contents()];
-
   // Fake a tab changed notification to force tab titles and favicons to update.
   [self tabChangedWithContents:newContents
                        atIndex:modelIndex