WebLocks: Minor improvements in browser-side implementation.

Change-Id: I366028613a73736af28799440cf87bfac5af3aae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2093551
Commit-Queue: Joshua Bell <jsbell@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748318}

content/browser/locks/lock_manager.cc

@@ -141,7 +141,7 @@ class LockManager::Lock {
   mojo::SelfOwnedAssociatedReceiverRef<blink::mojom::LockHandle> handle_;
 };
 
-LockManager::LockManager() {}
+LockManager::LockManager() = default;
 
 LockManager::~LockManager() = default;
 
@@ -149,7 +149,8 @@ LockManager::~LockManager() = default;
 // for a given origin.
 class LockManager::OriginState {
  public:
-  OriginState(LockManager* lock_manager) : lock_manager_(lock_manager) {}
+  explicit OriginState(LockManager* lock_manager)
+      : lock_manager_(lock_manager) {}
   ~OriginState() = default;
 
   // Helper function for breaking the lock at the front of a given request
@@ -263,7 +264,7 @@ class LockManager::OriginState {
     }
   }
 
-  bool IsEmpty() { return lock_id_to_iterator_.empty(); }
+  bool IsEmpty() const { return lock_id_to_iterator_.empty(); }
 
   std::pair<std::vector<blink::mojom::LockInfoPtr>,
             std::vector<blink::mojom::LockInfoPtr>>
@@ -300,7 +301,7 @@ class LockManager::OriginState {
 
   // Any OriginState is owned by a LockManager so a raw pointer back to an
   // OriginState's owning LockManager is safe.
-  LockManager* lock_manager_;
+  LockManager* const lock_manager_;
 };
 
 void LockManager::BindReceiver(

content/browser/locks/lock_manager.h

@@ -2,13 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_BROWSER_LOCKS_LOCK_CONTEXT_H_
-#define CONTENT_BROWSER_LOCKS_LOCK_CONTEXT_H_
+#ifndef CONTENT_BROWSER_LOCKS_LOCK_MANAGER_H_
+#define CONTENT_BROWSER_LOCKS_LOCK_MANAGER_H_
 
+#include <cstdint>
+#include <map>
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
+#include "base/memory/weak_ptr.h"
 #include "base/sequence_checker.h"
 #include "content/public/browser/browser_context.h"
 #include "mojo/public/cpp/bindings/receiver_set.h"
@@ -25,6 +28,9 @@ class LockManager : public blink::mojom::LockManager {
   LockManager();
   ~LockManager() override;
 
+  LockManager(const LockManager&) = delete;
+  LockManager& operator=(const LockManager&) = delete;
+
   // Binds |receiver| to this LockManager. |receiver| belongs to a frame or
   // worker at |origin| hosted by |render_process_id|. If it belongs to a frame,
   // |render_frame_id| identifies it, otherwise it is MSG_ROUTING_NONE.
@@ -73,10 +79,8 @@ class LockManager : public blink::mojom::LockManager {
 
   SEQUENCE_CHECKER(sequence_checker_);
   base::WeakPtrFactory<LockManager> weak_ptr_factory_{this};
-
-  DISALLOW_COPY_AND_ASSIGN(LockManager);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_LOCKS_LOCK_CONTEXT_H
+#endif  // CONTENT_BROWSER_LOCKS_LOCK_MANAGER_H