Fixed all unused-variable Clang warnings on Windows.

chrome/browser/ui/views/frame/opaque_browser_frame_view.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 "chrome/browser/ui/views/frame/opaque_browser_frame_view.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 58 matching lines @@
 // span the whole nonclient area, so there's no "dead zone" for the mouse.)
 const int kTopResizeAdjust = 1;
 
 // In the window corners, the resize areas don't actually expand bigger, but the
 // 16 px at the end of each edge triggers diagonal resizing.
 const int kResizeAreaCornerSize = 16;
 
 // The content left/right images have a shadow built into them.
 const int kContentEdgeShadowThickness = 2;
 
+#if !defined(OS_WIN)
 // The icon never shrinks below 16 px on a side.
 const int kIconMinimumSize = 16;
+#endif
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
 // The number of pixels to move the frame background image upwards when using
 // the GTK+ theme and the titlebar is condensed.
 const int kGTKThemeCondensedFrameTopInset = 15;
 #endif
 
 }  // namespace
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 741 matching lines @@
       client_area_bottom + kClientEdgeThickness - client_area_top),
        toolbar_color);
   canvas->FillRect(gfx::Rect(client_area_bounds.x(), client_area_bottom,
                              client_area_bounds.width(), kClientEdgeThickness),
                    toolbar_color);
   canvas->FillRect(gfx::Rect(client_area_bounds.right(), client_area_top,
       kClientEdgeThickness,
       client_area_bottom + kClientEdgeThickness - client_area_top),
       toolbar_color);
 }