Views: Use the new button style instead of native-styled buttons.

Views: Use the new button style instead of native-styled buttons.

Force STYLE_BUTTON instead of STYLE_NATIVE_TEXTBUTTON.
( easier to revert than replacing all uses, if necessary )
Make STYLE_BUTTON focusable like STYLE_NATIVE_TEXTBUTTON.
Give default STYLE_BUTTON buttons bold text.

Make STYLE_BUTTON buttons big enough for bolded text.
( so they'll fit bold text when made default without resizing )

See before/after pics at http://crbug.com/155363#c62

TODO(followup): Tweak individual buttons' layout as needed.
TODO(followup): Officialy deprecate/remove STYLE_NATIVE_TEXTBUTTON.

BUG=155363
TEST=The new button style appears everywhere as intended.
R=ben@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=194673

[msw, 2013-04-17 00:24:36]

Hey Scott, please take a look; thanks!

This bold text accommodation here makes this CL unnecessary:
https://codereview.chromium.org/14230018/

[msw, 2013-04-17 00:29:14]

Added before/after pics at http://crbug.com/155363#c62

[msw, 2013-04-17 08:14:38]

Hey Ben, please take a look; thanks!

[Ben Goodger (Google), 2013-04-17 20:05:24]

lgtm

[msw, 2013-04-17 21:09:30]

Committed patchset #5 manually as r194673 (presubmit successful).