ContentCapture Refactoring: Remove SentNodes class

SentNodes is a wrapper of HeapHashSet and has little value be a
separated class.

This patch also moves SentNodes to TaskSession, it was used to
share the SentNode between the different ContentCaptureTasks, but
ContentCaptureTask will never be recreated.

Bug: 1137463
Change-Id: Ic8f958a8ae4da957fd3ab49e1b65faa9508acac4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466505Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Michael Bai <michaelbai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816399}

third_party/blink/renderer/core/content_capture/BUILD.gn

@@ -16,8 +16,6 @@ blink_core_sources("content_capture") {
     "content_capture_task_histogram_reporter.h",
     "content_holder.cc",
     "content_holder.h",
-    "sent_nodes.cc",
-    "sent_nodes.h",
     "task_session.cc",
     "task_session.h",
   ]

third_party/blink/renderer/core/content_capture/content_capture_manager.cc

@@ -5,7 +5,6 @@
 #include "third_party/blink/renderer/core/content_capture/content_capture_manager.h"
 
 #include "base/time/time.h"
-#include "third_party/blink/renderer/core/content_capture/sent_nodes.h"
 #include "third_party/blink/renderer/core/frame/local_frame.h"
 #include "third_party/blink/renderer/core/layout/layout_text.h"
 
@@ -29,8 +28,7 @@ void ContentCaptureManager::UserActivation::Trace(Visitor* visitor) const {
 ContentCaptureManager::ContentCaptureManager(LocalFrame& local_frame_root)
     : local_frame_root_(&local_frame_root) {
   DCHECK(local_frame_root.IsLocalRoot());
-  sent_nodes_ = MakeGarbageCollected<SentNodes>();
-  task_session_ = MakeGarbageCollected<TaskSession>(*sent_nodes_);
+  task_session_ = MakeGarbageCollected<TaskSession>();
 }
 
 ContentCaptureManager::~ContentCaptureManager() = default;
@@ -114,7 +112,6 @@ void ContentCaptureManager::Trace(Visitor* visitor) const {
   visitor->Trace(content_capture_idle_task_);
   visitor->Trace(local_frame_root_);
   visitor->Trace(task_session_);
-  visitor->Trace(sent_nodes_);
   visitor->Trace(latest_user_activation_);
 }
 

third_party/blink/renderer/core/content_capture/content_capture_manager.h

@@ -16,7 +16,6 @@ namespace blink {
 
 class LocalFrame;
 class Node;
-class SentNodes;
 
 // This class is used to create the NodeHolder, and start the ContentCaptureTask
 // when necessary. The ContentCaptureManager is owned by main frame.
@@ -83,9 +82,6 @@ class CORE_EXPORT ContentCaptureManager
 
   Member<TaskSession> task_session_;
 
-  // A set of weak reference of the node that has been sent.
-  Member<SentNodes> sent_nodes_;
-
   // The latest user activation in any frame of the |local_frame_root_|.
   Member<UserActivation> latest_user_activation_;
 };

third_party/blink/renderer/core/content_capture/sent_nodes.cc

-// Copyright 2019 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 "third_party/blink/renderer/core/content_capture/sent_nodes.h"
-
-#include "third_party/blink/renderer/core/dom/node.h"
-
-namespace blink {
-
-bool SentNodes::HasSent(const Node& node) {
-  return sent_nodes_.Contains(&node);
-}
-
-void SentNodes::OnSent(const Node& node) {
-  sent_nodes_.insert(WeakMember<const Node>(&node));
-}
-
-void SentNodes::Trace(Visitor* visitor) const {
-  visitor->Trace(sent_nodes_);
-}
-
-}  // namespace blink

third_party/blink/renderer/core/content_capture/sent_nodes.h

-// Copyright 2019 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.
-
-#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CONTENT_CAPTURE_SENT_NODES_H_
-#define THIRD_PARTY_BLINK_RENDERER_CORE_CONTENT_CAPTURE_SENT_NODES_H_
-
-#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
-#include "third_party/blink/renderer/platform/heap/heap_allocator.h"
-#include "third_party/blink/renderer/platform/heap/member.h"
-
-namespace blink {
-
-class Node;
-
-// The class manages a list of nodes that have been sent, is only used when
-// kNodeID is used, see WebContentCaptureClient::GetNodeType().
-class SentNodes final : public GarbageCollected<SentNodes> {
- public:
-  bool HasSent(const Node& node);
-  void OnSent(const Node& node);
-
-  void Trace(Visitor*) const;
-
- private:
-  HeapHashSet<WeakMember<const Node>> sent_nodes_;
-};
-
-}  // namespace blink
-
-#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CONTENT_CAPTURE_SENT_NODES_H_

third_party/blink/renderer/core/content_capture/task_session.cc

@@ -6,14 +6,14 @@
 
 #include <utility>
 
-#include "third_party/blink/renderer/core/content_capture/sent_nodes.h"
 #include "third_party/blink/renderer/core/dom/document.h"
 #include "third_party/blink/renderer/core/dom/dom_node_ids.h"
 
 namespace blink {
 
-TaskSession::DocumentSession::DocumentSession(const Document& document,
-                                              SentNodes& sent_nodes,
+TaskSession::DocumentSession::DocumentSession(
+    const Document& document,
+    HeapHashSet<WeakMember<const Node>>& sent_nodes,
     SentNodeCountCallback& callback)
     : document_(&document), sent_nodes_(&sent_nodes), callback_(callback) {}
 
@@ -46,8 +46,8 @@ ContentHolder* TaskSession::DocumentSession::GetNextUnsentNode() {
   while (!captured_content_.IsEmpty()) {
     auto node = captured_content_.begin()->key;
     const gfx::Rect rect = captured_content_.Take(node);
-    if (node && node->GetLayoutObject() && !sent_nodes_->HasSent(*node)) {
-      sent_nodes_->OnSent(*node);
+    if (node && node->GetLayoutObject() && !sent_nodes_->Contains(node)) {
+      sent_nodes_->insert(WeakMember<const Node>(node));
       total_sent_nodes_++;
       return MakeGarbageCollected<ContentHolder>(node, rect);
     }
@@ -69,7 +69,6 @@ ContentHolder* TaskSession::DocumentSession::GetNextChangedNode() {
 
 void TaskSession::DocumentSession::Trace(Visitor* visitor) const {
   visitor->Trace(captured_content_);
-  visitor->Trace(sent_nodes_);
   visitor->Trace(document_);
   visitor->Trace(changed_content_);
 }
@@ -80,7 +79,7 @@ void TaskSession::DocumentSession::Reset() {
   detached_nodes_.Clear();
 }
 
-TaskSession::TaskSession(SentNodes& sent_nodes) : sent_nodes_(sent_nodes) {}
+TaskSession::TaskSession() = default;
 
 TaskSession::DocumentSession* TaskSession::GetNextUnsentDocumentSession() {
   for (auto& doc : to_document_session_.Values()) {
@@ -109,7 +108,7 @@ void TaskSession::GroupCapturedContentByDocument(
     if (Node* node = DOMNodeIds::NodeForId(i.node_id)) {
       if (changed_nodes_.Take(node)) {
         // The changed node might not be sent.
-        if (sent_nodes_->HasSent(*node)) {
+        if (sent_nodes_.Contains(node)) {
           EnsureDocumentSession(node->GetDocument())
               .AddChangedNode(*node, i.visual_rect);
         } else {
@@ -118,7 +117,7 @@ void TaskSession::GroupCapturedContentByDocument(
         }
         continue;
       }
-      if (!sent_nodes_->HasSent(*node)) {
+      if (!sent_nodes_.Contains(node)) {
         EnsureDocumentSession(node->GetDocument())
             .AddCapturedNode(*node, i.visual_rect);
       }
@@ -127,7 +126,7 @@ void TaskSession::GroupCapturedContentByDocument(
 }
 
 void TaskSession::OnNodeDetached(const Node& node) {
-  if (sent_nodes_->HasSent(node)) {
+  if (sent_nodes_.Contains(&node)) {
     EnsureDocumentSession(node.GetDocument())
         .AddDetachedNode(reinterpret_cast<int64_t>(&node));
     has_unsent_data_ = true;
@@ -143,7 +142,7 @@ TaskSession::DocumentSession& TaskSession::EnsureDocumentSession(
   DocumentSession* doc_session = GetDocumentSession(doc);
   if (!doc_session) {
     doc_session =
-        MakeGarbageCollected<DocumentSession>(doc, *sent_nodes_, callback_);
+        MakeGarbageCollected<DocumentSession>(doc, sent_nodes_, callback_);
     to_document_session_.insert(&doc, doc_session);
   }
   return *doc_session;

third_party/blink/renderer/core/content_capture/task_session.h

@@ -22,7 +22,6 @@
 namespace blink {
 
 class Document;
-class SentNodes;
 
 // This class wraps the captured content and the detached nodes that need to be
 // sent out by the ContentCaptureTask, it has a Document to DocumentSession
@@ -51,7 +50,7 @@ class TaskSession final : public GarbageCollected<TaskSession> {
     using SentNodeCountCallback = base::RepeatingCallback<void(size_t)>;
 
     DocumentSession(const Document& document,
-                    SentNodes& sent_nodes,
+                    HeapHashSet<WeakMember<const Node>>& sent_nodes,
                     SentNodeCountCallback& call_back);
     ~DocumentSession();
     void AddCapturedNode(Node& node, const gfx::Rect& rect);
@@ -90,7 +89,7 @@ class TaskSession final : public GarbageCollected<TaskSession> {
     // LayoutTree.
     WebVector<int64_t> detached_nodes_;
     WeakMember<const Document> document_;
-    Member<SentNodes> sent_nodes_;
+    HeapHashSet<WeakMember<const Node>>* sent_nodes_;
     // The list of changed nodes that needs to be sent.
     HeapHashMap<WeakMember<Node>, gfx::Rect> changed_content_;
 
@@ -102,7 +101,7 @@ class TaskSession final : public GarbageCollected<TaskSession> {
     base::Optional<SentNodeCountCallback> callback_;
   };
 
-  TaskSession(SentNodes& sent_nodes);
+  TaskSession();
 
   // Returns the DocumentSession that hasn't been sent.
   DocumentSession* GetNextUnsentDocumentSession();
@@ -132,7 +131,8 @@ class TaskSession final : public GarbageCollected<TaskSession> {
   DocumentSession& EnsureDocumentSession(const Document& doc);
   DocumentSession* GetDocumentSession(const Document& document) const;
 
-  Member<SentNodes> sent_nodes_;
+  // A set of weak reference of the node that has been sent.
+  HeapHashSet<WeakMember<const Node>> sent_nodes_;
 
   // The list of node whose value has changed.
   HeapHashSet<WeakMember<Node>> changed_nodes_;