Paint the hover animation state when painting just the favicon.

chrome/browser/gtk/tabs/tab_renderer_gtk.cc

 // Copyright (c) 2009 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/gtk/tabs/tab_renderer_gtk.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "app/gfx/canvas_paint.h"
@@ skipping 353 matching lines @@
     }
     if (!theme_provider_->HasCustomImage(theme_id))
       offset_y = kInactiveTabBackgroundOffsetY;
   }
   SkBitmap* tab_bg = theme_provider_->GetBitmapNamed(theme_id);
   canvas.TileImageInt(*tab_bg,
       x() + favicon_bounds_.x(), offset_y + favicon_bounds_.y(),
       favicon_bounds_.x(), favicon_bounds_.y(),
       favicon_bounds_.width(), favicon_bounds_.height());
 
+  // Draw our hover state.
+  if (!IsSelected()) {
+    Animation* animation = hover_animation_.get();
+    if (animation->GetCurrentValue() > 0) {
+      SkRect bounds;
+      bounds.set(favicon_bounds_.x(), favicon_bounds_.y(),
+          favicon_bounds_.right(), favicon_bounds_.bottom());
+      canvas.saveLayerAlpha(&bounds,
+          static_cast<int>(animation->GetCurrentValue() * kHoverOpacity * 0xff),
+              SkCanvas::kARGB_ClipLayer_SaveFlag);
+      canvas.drawARGB(0, 255, 255, 255, SkXfermode::kClear_Mode);
+      SkBitmap* active_bg = theme_provider_->GetBitmapNamed(IDR_THEME_TOOLBAR);
+      canvas.TileImageInt(*active_bg,
+          x() + favicon_bounds_.x(), favicon_bounds_.y(),
+          favicon_bounds_.x(), favicon_bounds_.y(),
+          favicon_bounds_.width(), favicon_bounds_.height());
+      canvas.restore();
+    }
+  }
+
   // Now paint the icon.
   PaintIcon(&canvas);
 }
 
 // static
 gfx::Size TabRendererGtk::GetMinimumUnselectedSize() {
   InitResources();
 
   gfx::Size minimum_size;
   minimum_size.set_width(kLeftPadding + kRightPadding);
@@ skipping 597 matching lines @@
   // Force the font size to 9pt, which matches Windows' default font size
   // (taken from the system).
   gfx::Font base_font = rb.GetFont(ResourceBundle::BaseFont);
   title_font_ = new gfx::Font(gfx::Font::CreateFont(base_font.FontName(), 9));
   title_font_height_ = title_font_->height();
 
   crashed_fav_icon = rb.GetBitmapNamed(IDR_SAD_FAVICON);
 
   initialized_ = true;
 }