Revert 238143 "Merge 237646 "Ensure that the OSK on Windows 8 sh..."

Revert 238143 "Merge 237646 "Ensure that the OSK on Windows 8 sh..."

> Merge 237646 "Ensure that the OSK on Windows 8 shows up when we ..."
> 
> > Ensure that the OSK on Windows 8 shows up when we tap on an editable field in any WebContents.
> > 
> > The current implementation was displaying the OSK only when we tapped on a WebContents hosted by a Browser window. This
> > relied on the ChromeRenderViewObserver object in the renderer sending an IPC message ChromeViewHostMsg_FocusedNodeTouched
> > which is handled by the Chrome browser code via a WebContentsObserver implementation.
> > 
> > Based on discussions with jam and comments from avi in the review, we decided to implement this functionality in content.
> > 
> > Fixes are as below:-
> > 1. We have a new IPc message ViewHostMsg_FocusedNodeTouched which is defined in the view_messages.h file.
> > 2. This IPC is sent by the RenderViewImpl::didHandleGestureEvent method if we tapped on an editable field.
> > 3, This IPC is handled by the RenderViewHostImpl class. We display the OSK on Windows 8 Aura if a focused editable
> >    node was tapped.
> > 4. The ChromeViewHostMsg_FocusedNodeTouched IPC has been deleted along with the didHandleGestureEvent method in the
> >    RenderViewObserver interface.
> > 
> > BUG=321576, 319219
> > R=jam@chromium.org, palmer@chromium.org, jam
> > TBR=jschuh
> > 
> > Review URL: https://codereview.chromium.org/89873002
> 
> TBR=ananta@chromium.org
> 
> Review URL: https://codereview.chromium.org/99843002

TBR=cpu@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=238153

[kareng, 2013-12-02 19:43:57]

Committed patchset #1 manually as r238153.