OOPIF: Route keyboard events to focused frame in the browser process.

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 3ced095e950303c4870ec6f7325b6a381874fcef..b8a3f983df34b77fc266917a8ab885e33fa2c4ea 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -1677,8 +1677,20 @@ void RenderWidgetHostViewAndroid::UnlockMouse() {
 
 void RenderWidgetHostViewAndroid::SendKeyEvent(
     const NativeWebKeyboardEvent& event) {
-  if (host_)
-    host_->ForwardKeyboardEvent(event);
+  if (host_) {

[kenrb, 2015/10/28 21:07:05]

It's cleaner to invert this into an early return
if (!host_)
  return;

[alexmos, 2015/10/29 05:26:29]

Done.

+    RenderWidgetHostImpl* target_host = host_;
+
+    // If there are multiple widgets on the page (such as when there are
+    // out-of-process iframes), pick the one that should process this event.
+    if (host_->delegate()) {
+      RenderWidgetHostImpl* focused_host =
+          host_->delegate()->GetFocusedRenderWidgetHost();
+      if (focused_host)
+        target_host = focused_host;
+    }
+
+    target_host->ForwardKeyboardEvent(event);
+  }
 }
 
 void RenderWidgetHostViewAndroid::SendMouseEvent(