Implement Printer Preference Persistence (Step 1/3)

Introduce new "Preferences" for printer overlays were added in PrefNames:  
- printing.page.header.left  
- printing.page.header.center 
- printing.page.header.right 
- printing.page.footer.left 
- printing.page.footer.center 
- printing.page.footer.right

The prefs file will look like this:

"printing": {
   "page": {
      "header": {
         "left": " ",
         "center": " ",
         "right": " "
      },
      "footer": {
         "left": "{date}",
         "center": " ",
         "right": " "
      }
   }
}

The steps for Printer Preferences:

Step 1:
 Introduce some sort of persistence for header/footer which is located 
in the Preference file.

Step 2:
 Allow PrinterQuery to read those stored preferences and setup 
PrinterSettings so that it will apply it when printing.

Step 3:
 Create a UI for the print preference, so that the users will easily 
change those printing settings.

NOTE: I tested the following approach while doing a simple Hack with 
PrintJob (if you see the previous patch), and it works great, with some 
bad after effect.
It was done for testing purposes. So I hope we are going in the right
direction.

BUG=947 (http://crbug.com/947)

Patch contributed by Mohamed Mansour <m0.interactive@gmail.com>

Review: http://codereview.chromium.org/60118/show

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13426 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 1 deletions

diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index d2608c5..300e6ab 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2009 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.
 
@@ -235,6 +235,14 @@ const wchar_t kBookmarkManagerSplitLocation[] =
 // Boolean pref to define the default values for using spellchecker.
 const wchar_t kEnableSpellCheck[] = L"browser.enable_spellchecking";
 
+// String pref to define the default values for print overlays.
+const wchar_t kPrintingPageHeaderLeft[] = L"printing.page.header.left";
+const wchar_t kPrintingPageHeaderCenter[] = L"printing.page.header.center";
+const wchar_t kPrintingPageHeaderRight[] = L"printing.page.header.right";
+const wchar_t kPrintingPageFooterLeft[] = L"printing.page.footer.left";
+const wchar_t kPrintingPageFooterCenter[] = L"printing.page.footer.center";
+const wchar_t kPrintingPageFooterRight[] = L"printing.page.footer.right";
+
 // *************** LOCAL STATE ***************
 // These are attached to the machine/installation