Fix keyboard focus for OOPIF-<webview>.

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index fad565d27c6eaef57d89c1087056567fb40a7363..72a6fbe79515ef625afa1bb696997fca99aa278f 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -2903,6 +2903,13 @@ void WebViewImpl::focusDocumentView(WebFrame* frame)
     page()->focusController().focusDocumentView(frame->toImplBase()->frame(), false /* notifyEmbedder */);
 }
 
+void WebViewImpl::unfocusDocumentView(WebFrame* frame)
+{
+    LocalFrame* focusedFrame = page()->focusController().focusedFrame();
+    DCHECK(!focusedFrame || focusedFrame == frame->toImplBase()->frame());
+    page()->focusController().focusDocumentView(nullptr /* frame */, false /* notifyEmbedder */);
+}
+
 void WebViewImpl::setInitialFocus(bool reverse)
 {
     if (!m_page)