Build in a ../sconsbuild directory by default:...

site_scons/site_tools/chromium_builders.py

 # 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.
 
 """
 Tool module for adding, to a construction environment, Chromium-specific
 wrappers around Hammer builders.  This gives us a central place for any
 customization we need to make to the different things we build.
 """
 
@@ skipping 173 matching lines @@
     return [x for x in sources if compilable(env, x)]
   result = []
   for top, folders, nonfolders in FileListWalk(sources):
     result.extend([x for x in nonfolders if compilable(env, x)])
   return result
 
 def ChromeProgram(env, target, source, *args, **kw):
   source = compilable_files(env, source)
   if env.get('_GYP'):
     prog = env.Program(target, source, *args, **kw)
-    result = env.Install('$DESTINATION_ROOT', prog)
+    result = env.Install('$TOP_BUILDDIR', prog)
   else:
     result = env.ComponentProgram(target, source, *args, **kw)
   if env.get('INCREMENTAL'):
     env.Precious(result)
   return result
 
 def ChromeTestProgram(env, target, source, *args, **kw):
   source = compilable_files(env, source)
   if env.get('_GYP'):
     prog = env.Program(target, source, *args, **kw)
-    result = env.Install('$DESTINATION_ROOT', prog)
+    result = env.Install('$TOP_BUILDDIR', prog)
   else:
     result = env.ComponentTestProgram(target, source, *args, **kw)
   if env.get('INCREMENTAL'):
     env.Precious(*result)
   return result
 
 def ChromeLibrary(env, target, source, *args, **kw):
   source = compilable_files(env, source)
   if env.get('_GYP'):
     lib = env.Library(target, source, *args, **kw)
@@ skipping 94 matching lines @@
   # Add the grit tool to the base environment because we use this a lot.
   sys.path.append(env.Dir('$SRC_DIR/tools/grit').abspath)
   env.Tool('scons', toolpath=[env.Dir('$SRC_DIR/tools/grit/grit')])
 
   # Add the repack python script tool that we use in multiple places.
   sys.path.append(env.Dir('$SRC_DIR/tools/data_pack').abspath)
   env.Tool('scons', toolpath=[env.Dir('$SRC_DIR/tools/data_pack/')])
 
 def exists(env):
   return True