Make the popup blocker on by default. Flip the flag to be a disabling one.

chrome/browser/ui/views/location_bar/content_setting_image_view.cc

 // 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.
 
 #include "chrome/browser/ui/views/location_bar/content_setting_image_view.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
@@ skipping 77 matching lines @@
 
   // The content blockage was not yet indicated to the user. Start indication
   // animation and clear "not yet shown" flag.
   content_settings->SetBlockageHasBeenIndicated(
       content_setting_image_model_->get_content_settings_type());
 
   int animated_string_id =
       content_setting_image_model_->explanatory_string_id();
   // Check if the animation is enabled and if the string for animation is
   // available.
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableBlockContentAnimation) || !animated_string_id)
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableBlockContentAnimation) || !animated_string_id)
     return;
 
   // Do not start animation if already in progress.
   if (!animation_in_progress_) {
     animation_in_progress_ = true;
     // Initialize animated string. It will be cleared when animation is
     // completed.
     animated_text_ = l10n_util::GetStringUTF16(animated_string_id);
     text_size_ = ResourceBundle::GetSharedInstance().GetFont(
         ResourceBundle::MediumFont).GetStringWidth(animated_text_);
@@ skipping 125 matching lines @@
   } else if (state > (1.0 - kAnimatingFraction)) {
     visible_text_size_ = static_cast<int>(text_size_ * (1.0 - state) /
                                           kAnimatingFraction);
   } else {
     visible_text_size_ = text_size_;
   }
   parent_->Layout();
   parent_->SchedulePaint();
 }