Enables fullscreen subtitle and media control from Blink

In detail, this patch does the following things:
- Move the Blink SurfaceView on top of ContentVideoView
- Enable necessary bits on the compositor to make background transparent,
  and enables alpha blending.
- Introduce a new command-line flag to enable the new mode. The old-style
  Java media control are moved to ContentVideoViewLegacy, which is enabled
  by default.

To enable the blink-based media control, do the following:
adb shell
sudo echo chrome --enable-overlay-fullscreen-video-subtitle > /data/local/chrome-command-line

R=
BUG=262945

Review URL: https://codereview.chromium.org/25040002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243743 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243743
OneClickSigninBubbleView: Update the bubble form to reflect new bubble/
dialog UI design paradigm [Mac/Views]:

- Add a title ("You're now signed in to Chromium!")
- Modify "OK" button to say "OK, got it!" instead
- Adjust margins and gaps according to spec.

XIB changes:
* Added a new NSTextField for the “You’re now signed in to Chromium” title.
* Made the entire bubble taller (167 height) and wider (350 width) to accommodate new UI spec and to make room for the title text field.
* Repositioned the Advanced link and the OK button in order to have 10 view units margin from the bottom and left/right edges (also for new UI spec).

Screenshots:
* Mac: http://i.imgur.com/qKWKwR4.png
* Views: http://i.imgur.com/6fYmi42.png

BUG=322593
R=thakis@chromium.org

Review URL: https://codereview.chromium.org/107673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243744 0039d316-1c4b-4281-b951-d872f2087c98
Add flag to enable Privet storage

Add flag to enable Privet-based storage

BUG=332182

Review URL: https://codereview.chromium.org/126063004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243745 0039d316-1c4b-4281-b951-d872f2087c98
Pepper: Remove BrowserPpapiHostImpl::in_process().

It's not necessary to have this method.

BUG=313943

Review URL: https://codereview.chromium.org/126083002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243746 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243746