Implement basic ShowItemInFolder for linux....

chrome/common/common.scons

 # Copyright (c) 2006-2008 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.
 
 Import('env')
 
 env = env.Clone()
 
 env.SConscript([
     '$BREAKPAD_DIR/using_breakpad.scons',
@@ skipping 160 matching lines @@
     'notification_service.cc',
     'notification_service.h',
     'notification_source.h',
     'notification_types.h',
     'os_exchange_data.cc',
     'os_exchange_data.h',
     'owned_widget_gtk.cc',
     'owned_widget_gtk.h',
     'page_transition_types.h',
     'page_zoom.h',
+    'platform_util.h',
+    'platform_util_linux.cc',
+    'platform_util_mac.mm',
+    'platform_util_win.cc',
     '$CHROME_DIR/tools/build/win/precompiled$OBJSUFFIX',
     '$CHROME_DIR/tools/build/win/precompiled.h',
     'pref_member.cc',
     'pref_member.h',
     'pref_names.cc',
     'pref_names.h',
     'pref_service.cc',
     'pref_service.h',
     'process_watcher.cc',
     'process_watcher.h',
@@ skipping 59 matching lines @@
 
 if not env.Bit('windows'):
   # Windows specific files
   input_files.Remove(
       'chrome_paths_win.cc',
       'classfactory.cc',
       'gfx/chrome_canvas_win.cc',
       'gfx/chrome_font_win.cc',
       'gfx/path_win.cc',
       'ipc_channel_win.cc',
+      'platform_util_win.cc',
       'resource_bundle_win.cc',
       'win_safe_util.cc',
       'win_util.cc',
       '$CHROME_DIR/tools/build/win/precompiled$OBJSUFFIX',
   )
 
 if not env.Bit('linux'):
   # Linux specific files
   input_files.Remove(
       'chrome_paths_linux.cc',
       'gfx/chrome_canvas_skia.cc',
       'gfx/chrome_font_gtk.cc',
       'gfx/chrome_font_skia.cc',
       'gfx/path_gtk.cc',
       'owned_widget_gtk.cc',
       'owned_widget_gtk.h',
+      'platform_util_linux.cc',
       'resource_bundle_linux.cc',
   )
 
 if not env.Bit('mac'):
   # Mac specific files
   input_files.Remove(
       'chrome_paths_mac.cc',
+      'platform_util_mac.mm',
   )
 
 if not env.Bit('posix'):
   input_files.Remove(
       'ipc_channel_posix.cc',
   )
 
 if env.Bit('windows'):
   input_files.Append(
       'transport_dib_win.cc'
@@ skipping 60 matching lines @@
                 './common.vsprops',
                 '$(SolutionDir)../build/release.vsprops',
             ])
 
 p.AddFileConfig('../tools/build/win/precompiled.cc',
                 'Debug|Win32',
                 tools=[
                     MSVSTool('VCCLCompilerTool',
                              UsePrecompiledHeader='1'),
                 ])