[Extensions] Convert some ChromeSyncExtensionFunctions

chrome/browser/extensions/api/identity/identity_api.h

Index: chrome/browser/extensions/api/identity/identity_api.h
diff --git a/chrome/browser/extensions/api/identity/identity_api.h b/chrome/browser/extensions/api/identity/identity_api.h
index bf5d77f6d1fb8d22f17997358fe6325f142457a0..303885c6a07a160e8b3b181b677e2488ed43d5a7 100644
--- a/chrome/browser/extensions/api/identity/identity_api.h
+++ b/chrome/browser/extensions/api/identity/identity_api.h
@@ -318,8 +318,7 @@ class IdentityGetProfileUserInfoFunction
   ExtensionFunction::ResponseAction Run() override;
 };
 
-class IdentityRemoveCachedAuthTokenFunction
-    : public ChromeSyncExtensionFunction {
+class IdentityRemoveCachedAuthTokenFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("identity.removeCachedAuthToken",
                              EXPERIMENTAL_IDENTITY_REMOVECACHEDAUTHTOKEN)
@@ -328,8 +327,8 @@ class IdentityRemoveCachedAuthTokenFunction
  protected:
   ~IdentityRemoveCachedAuthTokenFunction() override;
 
-  // SyncExtensionFunction implementation:
-  bool RunSync() override;
+  // ExtensionFunction:
+  ResponseAction Run() override;
 };
 
 class IdentityLaunchWebAuthFlowFunction : public ChromeAsyncExtensionFunction,