Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/api/audio_modem/audio_modem_api.h

Index: chrome/browser/extensions/api/audio_modem/audio_modem_api.h
diff --git a/chrome/browser/extensions/api/audio_modem/audio_modem_api.h b/chrome/browser/extensions/api/audio_modem/audio_modem_api.h
index e5f0776c6d114a85df5342db6f5352fed9045d53..557e606e51d3e7951db3b5499fe16a769e3eb5aa 100644
--- a/chrome/browser/extensions/api/audio_modem/audio_modem_api.h
+++ b/chrome/browser/extensions/api/audio_modem/audio_modem_api.h
@@ -6,11 +6,11 @@
 #define CHROME_BROWSER_EXTENSIONS_API_AUDIO_MODEM_AUDIO_MODEM_API_H_
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "chrome/common/extensions/api/audio_modem.h"
 #include "components/audio_modem/public/modem.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
@@ -26,9 +26,10 @@ class AudioModemAPI final : public BrowserContextKeyedAPI {
   explicit AudioModemAPI(content::BrowserContext* context);
 
   // Testing constructor: pass in dependencies.
-  AudioModemAPI(content::BrowserContext* context,
-                scoped_ptr<audio_modem::WhispernetClient> whispernet_client,
-                scoped_ptr<audio_modem::Modem> modem);
+  AudioModemAPI(
+      content::BrowserContext* context,
+      std::unique_ptr<audio_modem::WhispernetClient> whispernet_client,
+      std::unique_ptr<audio_modem::Modem> modem);
 
   ~AudioModemAPI() override;
 
@@ -66,8 +67,8 @@ class AudioModemAPI final : public BrowserContextKeyedAPI {
   void TokensReceived(const std::vector<audio_modem::AudioToken>& tokens);
 
   content::BrowserContext* const browser_context_;
-  scoped_ptr<audio_modem::WhispernetClient> whispernet_client_;
-  scoped_ptr<audio_modem::Modem> modem_;
+  std::unique_ptr<audio_modem::WhispernetClient> whispernet_client_;
+  std::unique_ptr<audio_modem::Modem> modem_;
   bool init_failed_;
 
   // IDs for the currently transmitting app (if any), indexed by AudioType.