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 dbce5b06b65f7e4ff4ef9e4783670e765bcfada8..9bf391eba8a37142a22a01e694a5c6a1910f002e 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -2901,6 +2901,13 @@ void WebViewImpl::focusDocumentView(WebFrame* frame)
     page()->focusController().focusDocumentView(frame->toImplBase()->frame(), false /* notifyEmbedder */);
 }
 
+void WebViewImpl::unfocusDocumentView(WebFrame* frame)
+{
+    LocalFrame* focusedFrame = page()->focusController().focusedFrame();
+    ASSERT(!focusedFrame || focusedFrame == frame->toImplBase()->frame());
+    page()->focusController().focusDocumentView(nullptr /* frame */, false /* notifyEmbedder */);
+}
+
 void WebViewImpl::setInitialFocus(bool reverse)
 {
     if (!m_page)