Force a GuestView's embedder to be focused on TouchStart.

content/browser/frame_host/render_widget_host_view_guest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
@@ skipping 628 matching lines @@
 
   if (blink::WebInputEvent::isKeyboardEventType(event->type)) {
     if (!embedder->GetLastKeyboardEvent())
       return;
     NativeWebKeyboardEvent keyboard_event(*embedder->GetLastKeyboardEvent());
     host_->ForwardKeyboardEvent(keyboard_event);
     return;
   }
 
   if (blink::WebInputEvent::isTouchEventType(event->type)) {
+    if (event->type == blink::WebInputEvent::TouchStart &&
+        !embedder->GetView()->HasFocus()) {
+      embedder->GetView()->Focus();
+    }
+
     host_->ForwardTouchEventWithLatencyInfo(
         *static_cast<const blink::WebTouchEvent*>(event),
         ui::LatencyInfo());
     return;
   }
 
   if (blink::WebInputEvent::isGestureEventType(event->type)) {
     host_->ForwardGestureEvent(
         *static_cast<const blink::WebGestureEvent*>(event));
     return;
   }
 }
 
 }  // namespace content