CT: First step towards supporting Certificate Transparency in Chrome.

This patch adds Signed Certificate Timestamp (SCT) encoding/decoding.
SCT is the Certificate Transparency (CT) structure containing a proof
of a public log's commitment to adding a certificate to its public
repository.

The next patches would be extracting the SCTs when embedded in
certificates and verifying the signature from the SCT over them.

BUG=309578

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=232131

Review URL: https://codereview.chromium.org/37633002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232267 0039d316-1c4b-4281-b951-d872f2087c98
Request XSSI-escaped response for suggest.

This will request the suggest response to be escaped to protect it
against XSSI vulnerability and allow us to get psuggest responses
without using an XSRF token. Until the corresponding GWS change goes in,
the response is not modified. XSSI-escaped response will be correctly
handled after https://codereview.chromium.org/45863006/ lands.

BUG=312473

Review URL: https://codereview.chromium.org/51603002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232268 0039d316-1c4b-4281-b951-d872f2087c98
policy: fixes for configuration_policy==0.

Fixed:
- Excluded policy handlers when configuration_policy==0, and their unittests
- Moved a function out of ifdef (broken since https://codereview.chromium.org/14649004/)
- Fixed browser_tests that rely on policy code to #ifdef those parts
- Exclude the certificate_manager_browsertest when configuration_policy==0
- Exclude StorageSchemaManifestHandler::GetSchema() when configuration_policy==0

BUG=271392
R=joaodasilva

Review URL: https://codereview.chromium.org/51803004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232269 0039d316-1c4b-4281-b951-d872f2087c98
Update feedback app window size after it is shown.

BUG=313006

Review URL: https://codereview.chromium.org/51823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232270 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232269
SVN changes up to revision 232270