[PRImpl] Rename & moving in ComponentPaymentRequestImpl

Change:
* Rename teardown() to close(). "Teardown" was named because CPRImpl
used to implement PR#close. Now that MojoPaymentRequestGateKeeper has
taken over the PR#close implementation, CPRImpl can use "close" now.
CPRImpl#close is consistent in meaning with PaymentRequestImpl#close.
* Move BrowserPaymentRequestFactory from CPRImpl to
BrowserPaymentRequest, and it get renamed as Factory because now it's
in BrowserPaymentRequest's context.

Bug: 1102522

Change-Id: I47926eaa0a394d0698c1704823ba428e9abe4766
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348542
Commit-Queue: Liquan (Max) Gu <maxlg@chromium.org>
Reviewed-by: Sahel Sharify <sahel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797850}

chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java

@@ -1701,7 +1701,7 @@ public class PaymentRequestImpl
         mHasClosed = true;
 
         assert mComponentPaymentRequestImpl != null;
-        mComponentPaymentRequestImpl.teardown();
+        mComponentPaymentRequestImpl.close();
         mComponentPaymentRequestImpl = null;
 
         closeUIAndDestroyNativeObjects();

components/payments/content/android/java/src/org/chromium/components/payments/BrowserPaymentRequest.java

@@ -6,6 +6,7 @@ package org.chromium.components.payments;
 
 import androidx.annotation.Nullable;
 
+import org.chromium.content_public.browser.RenderFrameHost;
 import org.chromium.payments.mojom.PaymentDetails;
 import org.chromium.payments.mojom.PaymentMethodData;
 import org.chromium.payments.mojom.PaymentOptions;
@@ -17,6 +18,23 @@ import org.chromium.payments.mojom.PaymentValidationErrors;
  * Android Chrome browser or the WebLayer "browser".
  */
 public interface BrowserPaymentRequest {
+    /** The factory that creates an instance of {@link BrowserPaymentRequest}. */
+    interface Factory {
+        /**
+         * Create an instance of {@link BrowserPaymentRequest}.
+         * @param renderFrameHost The RenderFrameHost of the merchant page.
+         * @param componentPaymentRequestImpl The ComponentPaymentRequestImpl to work together with
+         *         the BrowserPaymentRequest instance.
+         * @param isOffTheRecord Whether the merchant page is in an OffTheRecord (e.g., incognito,
+         *         guest mode) Tab.
+         * @param journeyLogger The logger that records the user journey of PaymentRequest.
+         * @return An instance of BrowserPaymentRequest, cannot be null.
+         */
+        BrowserPaymentRequest createBrowserPaymentRequest(RenderFrameHost renderFrameHost,
+                ComponentPaymentRequestImpl componentPaymentRequestImpl, boolean isOffTheRecord,
+                JourneyLogger journeyLogger);
+    }
+
     /**
      * Initialize the browser part of the {@link PaymentRequest} implementation and validate the raw
      * payment request data coming from the untrusted mojo.