Merge 237646 "Ensure that the OSK on Windows 8 shows up when we ..."

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

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=238179

[ananta, 2013-12-02 20:54:14]

Committed patchset #1 manually as r238179.