[WebSocket] Compress an empty string to one byte.

Currently permessage-deflate deflater compresses an empty string to a
two-byte string "\x02\x00". It should be "\x00" to save space.

BUG=337781
R=tyoshino

Review URL: https://codereview.chromium.org/141613004

git-svn-id: svn://svn.chromium.org/blink/trunk@165758 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Improve IDBObjectStore exception messages.

BUG=270033

Review URL: https://codereview.chromium.org/131153004

git-svn-id: svn://svn.chromium.org/blink/trunk@165760 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert 165757 "TextAutosizer: fix second-pass container autosizing."

> TextAutosizer: fix second-pass container autosizing.
> 
> This patch adds a check to properly autosize containers inside
> stale clusters during the second pass of the algorithm (see
> crbug.com/335589 for more details). Additionaly this patch
> removes an unused method and adds a test.
> 
> BUG=335589,334228
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/141903002

Seems it broke fast/text-autosizing/second-pass-no-wrap-container-autosizing.html and
virtual/fasttextautosizing/fast/text-autosizing/second-pass-no-wrap-container-autosizing.html

TBR=timvolodine@chromium.org

Review URL: https://codereview.chromium.org/146973002

git-svn-id: svn://svn.chromium.org/blink/trunk@165761 bbb929c8-8fbe-4397-9dbb-9b2b20218538