Tone down the hover effect on mousing over background tabs.

ui/views/controls/glow_hover_controller.cc

 // Copyright (c) 2012 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 "ui/views/controls/glow_hover_controller.h"
 
 #include "ui/views/view.h"
 
 namespace views {
 
 // Amount to scale the opacity.
-static const double kTrackOpacityScale = 0.5;
+static const double kTrackOpacityScale = 0.25;
 static const double kHighlightOpacityScale = 1.0;
 
 // How long the hover state takes.
 static const int kTrackHoverDurationMs = 400;
 
 GlowHoverController::GlowHoverController(views::View* view)
     : view_(view),
       animation_(this),
       opacity_scale_(kTrackOpacityScale) {
   animation_.set_delegate(this);
@@ skipping 56 matching lines @@
 
 void GlowHoverController::AnimationEnded(const gfx::Animation* animation) {
   view_->SchedulePaint();
 }
 
 void GlowHoverController::AnimationProgressed(const gfx::Animation* animation) {
   view_->SchedulePaint();
 }
 
 }  // namespace views