Revert 220402 "Improve <webview> autosize:"

Revert 220402 "Improve <webview> autosize:"
Flakes Shim_TestAutosizeWithPartialAttributes at least on WinXP and MacOSX.

> Improve <webview> autosize:
> a. Expand/shrink <webview> element when 'sizechange' event fires, to
> match with the new view size (in shim).
> b. For SW mode, fix a bug where damage buffer would remain smaller than
> the view size and would result in crash. Added test for this case.
> 
> BUG=
> Test=WebViewTest.AutoSize.*
> 
> Review URL: https://chromiumcodereview.appspot.com/23499003

TBR=lazyboy@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=220584

[lazyboy, 2013-08-30 14:59:03]

Committed patchset #1 manually as r220584.