Support tracking focused element for OOPIFs.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 7b6e75e9f783a018f01e316085992f51749459ca..7f70472102a37dff4489f71e5e2fe905014b2d9e 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1583,6 +1583,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_SetHasReceivedUserGesture,
                         OnSetHasReceivedUserGesture)
     IPC_MESSAGE_HANDLER(FrameMsg_RunFileChooserResponse, OnFileChooserResponse)
+    IPC_MESSAGE_HANDLER(FrameMsg_ClearFocusedElement, OnClearFocusedElement)
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(FrameMsg_ActivateNearestFindResult,
                         OnActivateNearestFindResult)
@@ -5046,6 +5047,18 @@ void RenderFrameImpl::HandleWebAccessibilityEvent(
 }
 
 void RenderFrameImpl::FocusedNodeChanged(const WebNode& node) {
+  bool is_editable = false;
+  gfx::Rect node_bounds;
+  if (!node.isNull() && node.isElementNode()) {
+    WebElement element = const_cast<WebNode&>(node).to<WebElement>();
+    blink::WebRect rect = element.boundsInViewport();
+    GetRenderWidget()->convertViewportToWindow(&rect);
+    is_editable = element.isEditable();
+    node_bounds = gfx::Rect(rect);
+  }
+  Send(new FrameHostMsg_FocusedNodeChanged(routing_id_, is_editable,
+                                           node_bounds));
+
   for (auto& observer : observers_)
     observer.FocusedNodeChanged(node);
 }
@@ -5615,6 +5628,13 @@ void RenderFrameImpl::OnFileChooserResponse(
   }
 }
 
+void RenderFrameImpl::OnClearFocusedElement() {
+  // TODO(ekaramad): Should we add a method to WebLocalFrame instead and avoid
+  // calling this on the WebView?
+  if (auto* webview = render_view_->GetWebView())
+    webview->clearFocusedElement();
+}
+
 #if defined(OS_ANDROID)
 void RenderFrameImpl::OnActivateNearestFindResult(int request_id,
                                                   float x,