<webview>: Replace the secret object with the privates function

This CL also removes underscores from WebViewInternal members because all
members are private.

BUG=324859

Review URL: https://codereview.chromium.org/148083007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247381 0039d316-1c4b-4281-b951-d872f2087c98
Fix regression with r247334

GetLevelImage() does not handle GL_TEXTURE_CUBE_MAP.

TBR=reveman@chromium.org

Review URL: https://codereview.chromium.org/132333014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247382 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247382
Add GetSequenceNumber function to PPB_Flash_Clipboard

This provides access to a sequence number which identifies the clipboard state.

BUG=333094

Review URL: https://codereview.chromium.org/136183002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247383 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247383