Fixes and enhancements...

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.
 """
 
 def generate(env):
   def ChromeProgram(env, *args, **kw):
-    return env.ComponentProgram(*args, **kw)
+    result = env.ComponentProgram(*args, **kw)
+    if env.get('INCREMENTAL'):
+      env.Precious(result)
+    return result
   env.AddMethod(ChromeProgram)
 
   def ChromeTestProgram(env, *args, **kw):
-    return env.ComponentTestProgram(*args, **kw)
+    result = env.ComponentTestProgram(*args, **kw)
+    if env.get('INCREMENTAL'):
+      env.Precious(*result)
+    return result
   env.AddMethod(ChromeTestProgram)
 
   def ChromeStaticLibrary(env, *args, **kw):
     kw['COMPONENT_STATIC'] = True
     return env.ComponentLibrary(*args, **kw)
   env.AddMethod(ChromeStaticLibrary)
 
   def ChromeSharedLibrary(env, *args, **kw):
     kw['COMPONENT_STATIC'] = False
-    return [env.ComponentLibrary(*args, **kw)[0]]
+    result = [env.ComponentLibrary(*args, **kw)[0]]
+    if env.get('INCREMENTAL'):
+      env.Precious(result)
+    return result
   env.AddMethod(ChromeSharedLibrary)
 
   def ChromeObject(env, *args, **kw):
     return env.ComponentObject(*args, **kw)
   env.AddMethod(ChromeObject)
 
 def exists(env):
   return True