Browser Plugin: Remove Zoom

Browser Plugin: Remove Zoom

With the zoom refactor in flight: https://codereview.chromium.org/287093002/, zoom
plumbing for BrowserPlugin in the content layer is now entirely dead code. We need to revisit zoom in
the chrome layer for <webview> so that the embedder's zoom is propagated to the guests.

This will be done at a later time when we need to get <webview> in WebUI working again.

BUG=330264
TBR=jam@chromium.org for trivial browser_plugin_guest_delegate.h code deletion.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=273959

[lazyboy, 2014-05-30 15:08:35]

lgtm

[Fady Samuel, 2014-05-30 15:08:56]

The CQ bit was checked by fsamuel@chromium.org

[commit-bot: I haz the power, 2014-05-30 15:10:26]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/fsamuel@chromium.org/303423002/1

[Fady Samuel, 2014-05-30 17:54:04]

The CQ bit was checked by fsamuel@chromium.org

[commit-bot: I haz the power, 2014-05-30 17:57:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/fsamuel@chromium.org/303423002/20001

[commit-bot: I haz the power, 2014-05-31 00:39:06]

Change committed as 273959