[Passwords TTF] Add java side of the bridge

This CL adds the java-side of the bridge but doesn't use native calls
yet.

Bug: 957532
Change-Id: I0087ed5068d4cdafa07ffe1460f29e58604449c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1803304
Commit-Queue: Friedrich [CET] <fhorschig@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697975}

chrome/browser/touch_to_fill/android/BUILD.gn

@@ -7,6 +7,7 @@ import("//chrome/android/features/android_library_factory_tmpl.gni")
 
 generate_jni("jni_headers") {
   sources = [
+    "internal/java/src/org/chromium/chrome/browser/touch_to_fill/TouchToFillBridge.java",
     "java/src/org/chromium/chrome/browser/touch_to_fill/data/Credential.java",
   ]
 }

chrome/browser/touch_to_fill/android/internal/BUILD.gn

@@ -13,5 +13,8 @@ android_library("java") {
     "//ui/android:ui_java",
   ]
 
-  java_files = [ "java/src/org/chromium/chrome/browser/touch_to_fill/TouchToFillCoordinator.java" ]
+  java_files = [
+    "java/src/org/chromium/chrome/browser/touch_to_fill/TouchToFillBridge.java",
+    "java/src/org/chromium/chrome/browser/touch_to_fill/TouchToFillCoordinator.java",
+  ]
 }

chrome/browser/touch_to_fill/android/internal/java/src/org/chromium/chrome/browser/touch_to_fill/TouchToFillBridge.java

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.touch_to_fill;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.touch_to_fill.data.Credential;
+import org.chromium.ui.base.WindowAndroid;
+
+import java.util.Arrays;
+
+/**
+ * This bridge creates and initializes a {@link TouchToFillComponent} on construction and forwards
+ * native calls to it.
+ */
+class TouchToFillBridge {
+    private long mNativeView;
+    private final TouchToFillComponent mTouchToFillComponent;
+
+    private TouchToFillBridge(long nativeView, WindowAndroid windowAndroid) {
+        mNativeView = nativeView;
+        ChromeActivity activity = (ChromeActivity) windowAndroid.getActivity().get();
+        mTouchToFillComponent = new TouchToFillCoordinator();
+        mTouchToFillComponent.initialize(
+                activity, activity.getBottomSheetController(), this::onDismissed);
+    }
+
+    @CalledByNative
+    private static TouchToFillBridge create(long nativeView, WindowAndroid windowAndroid) {
+        return new TouchToFillBridge(nativeView, windowAndroid);
+    }
+
+    @CalledByNative
+    private static Credential[] createCredentialArray(int size) {
+        return new Credential[size];
+    }
+
+    @CalledByNative
+    private static void insertCredential(Credential[] credentials, int index, String username,
+            String password, String originUrl, boolean isPublicSuffixMatch) {
+        credentials[index] = new Credential(username, password, originUrl, isPublicSuffixMatch);
+    }
+
+    @CalledByNative
+    private void showCredentials(String formattedUrl, Credential[] credentials) {
+        mTouchToFillComponent.showCredentials(
+                formattedUrl, Arrays.asList(credentials), this::onSelectCredential);
+    }
+
+    private void onDismissed() {
+        // TODO(crbug.com/957532): Call native side to continue dismissing.
+        mNativeView = 0; // The native view shouldn't be used after it's dismissed.
+    }
+
+    private void onSelectCredential(Credential credential) {
+        assert mNativeView != 0 : "The native side is already dismissed";
+        // TODO(crbug.com/957532): Call native side to continue filling.
+    }
+}