Rename DeviceLoginScreenAppInstallList policy

This CL renames the "DeviceLoginScreenAppInstallList" to
"DeviceLoginScreenExtensions". The plan is to also allow whitelisted
extensions on the sign-in screen since apps will be deprecated soon.
This CL just renames the policy and doesn't perform any logic changes
(will be coming in a seperate CL).
This policy does not have server-side UI integration yet.

Bug: 938943
Change-Id: Id81826e0e50a2a3862b1569375720e4d6dd90248
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1505448
Commit-Queue: Alexander Hendrich <[email protected]>
Reviewed-by: Devlin <[email protected]>
Reviewed-by: Mattias Nissler <[email protected]>
Reviewed-by: Maksim Ivanov <[email protected]>
Cr-Commit-Position: refs/heads/master@{#646227}
diff --git a/chrome/browser/extensions/policy_handlers.h b/chrome/browser/extensions/policy_handlers.h
index 77f86cd..db0e0e2 100644
--- a/chrome/browser/extensions/policy_handlers.h
+++ b/chrome/browser/extensions/policy_handlers.h
@@ -83,14 +83,14 @@
 };
 
 // Parses the extension force install list for the login profile.
-class ExtensionInstallLoginScreenAppListPolicyHandler
+class ExtensionInstallLoginScreenExtensionsPolicyHandler
     : public ExtensionInstallListPolicyHandler {
  public:
-  ExtensionInstallLoginScreenAppListPolicyHandler();
-  ~ExtensionInstallLoginScreenAppListPolicyHandler() override = default;
+  ExtensionInstallLoginScreenExtensionsPolicyHandler();
+  ~ExtensionInstallLoginScreenExtensionsPolicyHandler() override = default;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(ExtensionInstallLoginScreenAppListPolicyHandler);
+  DISALLOW_COPY_AND_ASSIGN(ExtensionInstallLoginScreenExtensionsPolicyHandler);
 };
 
 // Implements additional checks for policies that are lists of extension