Fix download button waiting if document has started but not completed downloading
Doesn't traverse cyclic references in Dict.getAll; reduces empty-Dict garbage
Improved FTP support for Chromium extension
Use redirectUrl at onHeadersReceived if available.

http://crbug.com/280464 has been resolved, so we can now use redirectUrl at
onHeadersReceived.
For backwards-compatibility, the code for the original method has not been
removed, and a feature detection script was added that detects whether the
desired feature is available.
Added CSS rules to allow smooth (momentum) scrolling on iOS devices
Merge pull request #4545 from Rob--W/crx-api-enhancements

Use new Chromium APIs for FTP and redirects
Rewrite 'Preferences' to make it async
Modify {get, set}Preferences in PdfStreamConverter.jsm to support async
 Add preference to automatically enable the Hand Tool when the viewer loads
Merge pull request #4482 from Snuffleupagus/prefs-async-v2

Rewrite 'Preferences' to make it async
Set max size for the group
Prescales shading pattern packed data indices
Balance smask process chunking
Implements WebGL support
Merge pull request #4516 from dferer/ios-scrolling

Added CSS rules to improve scrolling on iOS devices
Merge pull request #4455 from aib/master

Fix download button waiting if document has started but not completed downloading
Sync l10n files
Add enableWebGL to the preferences
Refactors history and how the database is stored
Merge pull request #4559 from yurydelendik/history

Refactors history and how the database is stored