Migrate few places in blink to use the new mojo syntax

This is a followup of http://crrev/c/1685837. See more at
https://docs.google.com/document/d/1Jwfbzbe8ozaoilhqj5mAPYbYGpgZCen_XAAAdwmyP1E/edit

Bug: 955171
Change-Id: Ie98a786dbb61aa3feb7a5b7170a27f88c243c4b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1723020Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682798}

third_party/blink/renderer/core/dom/document.cc

@@ -4011,7 +4011,7 @@ bool Document::CheckCompletedInternal() {
 
     // Send the source ID of the document to the browser.
     if (frame_->Client()->GetRemoteNavigationAssociatedInterfaces()) {
-      mojom::blink::UkmSourceIdFrameHostAssociatedPtr ukm_binding;
+      mojo::AssociatedRemote<mojom::blink::UkmSourceIdFrameHost> ukm_binding;
       frame_->Client()->GetRemoteNavigationAssociatedInterfaces()->GetInterface(
           &ukm_binding);
       DCHECK(ukm_binding.is_bound());

third_party/blink/renderer/core/frame/viewport_data.h

@@ -5,6 +5,7 @@
 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_FRAME_VIEWPORT_DATA_H_
 #define THIRD_PARTY_BLINK_RENDERER_CORE_FRAME_VIEWPORT_DATA_H_
 
+#include "mojo/public/cpp/bindings/associated_remote.h"
 #include "third_party/blink/public/mojom/page/display_cutout.mojom-blink.h"
 #include "third_party/blink/renderer/core/core_export.h"
 #include "third_party/blink/renderer/core/page/viewport_description.h"
@@ -49,7 +50,7 @@ class ViewportData : public GarbageCollectedFinalized<ViewportData> {
   mojom::ViewportFit viewport_fit_ = blink::mojom::ViewportFit::kAuto;
   bool force_expand_display_cutout_ = false;
 
-  mojom::blink::DisplayCutoutHostAssociatedPtr display_cutout_host_;
+  mojo::AssociatedRemote<mojom::blink::DisplayCutoutHost> display_cutout_host_;
 };
 
 inline bool ViewportData::ShouldOverrideLegacyDescription(

third_party/blink/renderer/core/html/portal/portal_host.cc

@@ -59,7 +59,7 @@ Document* PortalHost::GetDocument() const {
 }
 
 void PortalHost::OnPortalActivated() {
-  portal_host_ptr_.reset();
+  portal_host_.reset();
 }
 
 void PortalHost::postMessage(ScriptState* script_state,
@@ -127,14 +127,14 @@ void PortalHost::ReceiveMessage(
 }
 
 mojom::blink::PortalHost& PortalHost::GetPortalHostInterface() {
-  if (!portal_host_ptr_) {
+  if (!portal_host_) {
     DCHECK(GetDocument()->GetFrame());
     GetDocument()
         ->GetFrame()
         ->GetRemoteNavigationAssociatedInterfaces()
-        ->GetInterface(&portal_host_ptr_);
+        ->GetInterface(&portal_host_);
   }
-  return *portal_host_ptr_;
+  return *portal_host_.get();
 }
 
 }  // namespace blink

third_party/blink/renderer/core/html/portal/portal_host.h

@@ -5,6 +5,7 @@
 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PORTAL_PORTAL_HOST_H_
 #define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PORTAL_PORTAL_HOST_H_
 
+#include "mojo/public/cpp/bindings/associated_remote.h"
 #include "third_party/blink/public/mojom/portal/portal.mojom-blink.h"
 #include "third_party/blink/renderer/core/core_export.h"
 #include "third_party/blink/renderer/core/dom/events/event_target.h"
@@ -65,7 +66,7 @@ class CORE_EXPORT PortalHost : public EventTargetWithInlineData,
  private:
   mojom::blink::PortalHost& GetPortalHostInterface();
 
-  mojom::blink::PortalHostAssociatedPtr portal_host_ptr_;
+  mojo::AssociatedRemote<mojom::blink::PortalHost> portal_host_;
 };
 
 }  // namespace blink