Remove unnecessary class forward declaration in WebViewImpl.h

Remove unnecessary class forward declaration in WebViewImpl.h

As some CLs have passed ownership of member variables from WebViewImpl to own core class,
some member variables have been removed in WebViewImpl.h. Thus, we don't
need to keep forward class declaration in the WebViewImpl.h as well. This
cl removes unnecessary forward declarations.

Additionally there are already unnecessary forward declarations. Those are
removed together.

BUG=N/A

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=171131

[gyuyoung-inactive, 2014-04-09 07:14:05]

On 2014/04/08 11:20:35, gyuyoung wrote:

Jochen, this patch passes trybots.

[jochen (gone - plz use gerrit), 2014-04-09 07:40:26]

lgtm

[gyuyoung-inactive, 2014-04-09 07:54:32]

The CQ bit was checked by gyuyoung.kim@samsung.com

[commit-bot: I haz the power, 2014-04-09 07:54:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gyuyoung.kim@samsung.com/225303020/1

[commit-bot: I haz the power, 2014-04-09 08:32:43]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-09 08:32:44]

Try jobs failed on following builders:
  tryserver.blink on win_blink_rel

[gyuyoung-inactive, 2014-04-09 09:29:25]

The CQ bit was checked by gyuyoung.kim@samsung.com

[commit-bot: I haz the power, 2014-04-09 09:29:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gyuyoung.kim@samsung.com/225303020/1

[commit-bot: I haz the power, 2014-04-09 10:10:19]

Change committed as 171131