Merge 241255 "[Mac] Passwords: Don't always prompt to access pas..."

Merge 241255 "[Mac] Passwords: Don't always prompt to access pas..."

> [Mac] Passwords: Don't always prompt to access passwords saved by other browsers
> 
> Disable Keychain password access prompts when Chrome's "Ask to save passwords"
> option is disabled. This gives users an escape hatch other than clicking
> "Always allow" or "Deny" for each password prompt when they have passwords
> saved from other browsers. This previously regressed with http://crrev.com/166878.
> 
> R=stuartmorgan@chromium.org
> TBR=atwilson@chromium.org
> BUG=178358
> TEST=
> 1. In *Safari*, navigate to a login page for which you can save a password.
> 2. Log in, and instruct Safari to save the password.
> 3. In *Chrome*, under Advanced Settings, disable password management.
> 4. Navigate to the same login page.
> At step (4), there should be no prompt for authorization to access the
> password saved in Safari.
> 
> Review URL: https://codereview.chromium.org/106053008

TBR=dubroy@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=241843

[Patrick Dubroy, 2013-12-19 11:53:13]

Committed patchset #1 manually as r241843.