master_preferences

[Anthony Quinn]

I'm editing the master_preferences.cc file in chromium/src/chrome/installer/util/ to set some default values upon installation. I know how the JSON file should look and the values I need to set but I fail to see how they're being created in the source code. For example, how would:

"first_run_tabs": [
        "http://gmail.com",
        "https://igoogle.com"
     ],

 translate into C++ in the file?

[Jói Sigurðsson]

Take a look at base/values.h, in particular ListValue and its
AppendString methods. You may also need DictionaryValue and its Set
method, in the same file.

Cheers,
Jói

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[Greg Thompson]

I'm afraid I don't understand your question. master_preferences is a JSON file that can be supplied by a packager when Chromium is installed. Chromium will load the JSON file at first run and do certain things accordingly. In the specific case of first_run_tabs, browser startup code (in chrome/browser/first_run) calls into MasterPreferences::GetFirstRunTabs to get the collection of strings in the JSON array.

Does this help answer your question?

[Anthony Quinn]

How I understood it was that master_preferences.cc created a default master_preferences JSON file in which chrome got it's initial preferences from. Is this correct or should I be writing the JSON file manually as a seperate file and placing it in myself?

[Greg Thompson]

On Thu, Jul 4, 2013 at 12:16 PM, Anthony Quinn <anthq...@gmail.com> wrote:

How I understood it was that master_preferences.cc created a default master_preferences JSON file in which chrome got it's initial preferences from. Is this correct or should I be writing the JSON file manually as a seperate file and placing it in myself?

master_preferences is an optional file created manually by packagers.

[Nico Weber]

If you just want to use a master preferences file, you don't need to edit anything in chromium's repository. There's some documentation at http://www.chromium.org/administrators/configuring-other-preferences and http://www.chromium.org/developers/design-documents/first-run-customizations (and possibly other places).

Nico