Revert "Plumb in crprocess instead of RunCommand to allow quiet operation."

sjg asked me to help revert his commit to fix the buildbots.

This reverts commit 77a59c0dc2b1f621dcdf0e8b99b873f4998bd691.

BUG=
TEST=

Review URL: http://codereview.chromium.org/6626039

Change-Id: I47e8606e8991d0891552449a428edd5d4d4d3713
diff --git a/lib/cros_build_lib.py b/lib/cros_build_lib.py
index 2ea48bf..fe30fcb 100644
--- a/lib/cros_build_lib.py
+++ b/lib/cros_build_lib.py
@@ -117,7 +117,6 @@
   return cmd_result
 
 
-#TODO(sjg): Remove this in favor of operation.Die
 def Die(message):
   """Emits a red error message and halts execution.
 
@@ -129,7 +128,6 @@
   sys.exit(1)
 
 
-#TODO(sjg): Remove this in favor of operation.Warning
 # pylint: disable-msg=W0622
 def Warning(message):
   """Emits a yellow warning message and continues execution.
@@ -141,18 +139,14 @@
       Color(_STDOUT_IS_TTY).Color(Color.YELLOW, '\nWARNING: ' + message))
 
 
-# This command is deprecated in favor of operation.Info()
-# It is left here for the moment so people are aware what happened.
-# The reason is that this is not aware of the terminal output restrictions such
-# as verbose, quiet and subprocess output. You should not be calling this.
-# def Info(message):
-#  """Emits a blue informational message and continues execution.
-#
-#  Args:
-#    message: The message to be emitted.
-#  """
-#  print >> sys.stderr, (
-#      Color(_STDOUT_IS_TTY).Color(Color.BLUE, '\nINFO: ' + message))
+def Info(message):
+  """Emits a blue informational message and continues execution.
+
+  Args:
+    message: The message to be emitted.
+  """
+  print >> sys.stderr, (
+      Color(_STDOUT_IS_TTY).Color(Color.BLUE, '\nINFO: ' + message))
 
 
 def ListFiles(base_dir):