[Offline Pages] Stub of offline pages bridge

BUG=491352
R=nyquist@chromium.org

Review URL: https://codereview.chromium.org/1232843003

Cr-Commit-Position: refs/heads/master@{#339379}

5 files changed, 131 insertions, 0 deletions

diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offline_pages/OfflinePageBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offline_pages/OfflinePageBridge.java
new file mode 100644
index 0000000..d4c6640
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offline_pages/OfflinePageBridge.java
@@ -0,0 +1,37 @@
+// Copyright 2015 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.offline_pages;
+
+import org.chromium.base.JNINamespace;
+import org.chromium.chrome.browser.profiles.Profile;
+
+/**
+ * Access gate to C++ side offline pages functionalities.
+ */
+@JNINamespace("offline_pages::android")
+public final class OfflinePageBridge {
+
+    private long mNativeOfflinePageBridge;
+
+    /**
+     * Creates offline pages bridge for a given profile.
+     */
+    public OfflinePageBridge(Profile profile) {
+        mNativeOfflinePageBridge = nativeInit(profile);
+    }
+
+    /**
+     * Destroys native offline pages bridge. It should be called during
+     * destruction to ensure proper cleanup.
+     */
+    public void destroy() {
+        assert mNativeOfflinePageBridge != 0;
+        nativeDestroy(mNativeOfflinePageBridge);
+        mNativeOfflinePageBridge = 0;
+    }
+
+    private native long nativeInit(Profile profile);
+    private native void nativeDestroy(long nativeOfflinePageBridge);
+}
diff --git a/chrome/browser/android/chrome_jni_registrar.cc b/chrome/browser/android/chrome_jni_registrar.cc
index 44de8f2..1297919 100644
--- a/chrome/browser/android/chrome_jni_registrar.cc
+++ b/chrome/browser/android/chrome_jni_registrar.cc
@@ -51,6 +51,7 @@
 #include "chrome/browser/android/metrics/variations_session.h"
 #include "chrome/browser/android/most_visited_sites.h"
 #include "chrome/browser/android/new_tab_page_prefs.h"
+#include "chrome/browser/android/offline_pages/offline_page_bridge.h"
 #include "chrome/browser/android/omnibox/answers_image_bridge.h"
 #include "chrome/browser/android/omnibox/autocomplete_controller_android.h"
 #include "chrome/browser/android/omnibox/omnibox_prerender.h"
@@ -256,6 +257,8 @@ static base::android::RegistrationMethod kChromeRegisteredMethods[] = {
      NotificationUIManagerAndroid::RegisterNotificationUIManager},
     {"OAuth2TokenServiceDelegateAndroid",
      OAuth2TokenServiceDelegateAndroid::Register},
+    {"OfflinePageBridge",
+     offline_pages::android::RegisterOfflinePageBridge},
     {"OmniboxPrerender", RegisterOmniboxPrerender},
     {"OmniboxUrlEmphasizer",
      OmniboxUrlEmphasizer::RegisterOmniboxUrlEmphasizer},
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.cc b/chrome/browser/android/offline_pages/offline_page_bridge.cc
new file mode 100644
index 0000000..b40611e
--- /dev/null
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.cc
@@ -0,0 +1,40 @@
+// Copyright 2015 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.
+
+#include "chrome/browser/android/offline_pages/offline_page_bridge.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_android.h"
+#include "components/offline_pages/offline_page_model.h"
+#include "content/public/browser/browser_context.h"
+#include "jni/OfflinePageBridge_jni.h"
+
+namespace offline_pages {
+namespace android {
+
+OfflinePageBridge::OfflinePageBridge(JNIEnv* env,
+                                     jobject obj,
+                                     content::BrowserContext* browser_context)
+    : weak_java_ref_(env, obj),
+      offline_page_model_(nullptr),
+      browser_context_(browser_context) {
+  // TODO(fgorski): Pull offline pages model from the factory once it is
+  // available.
+}
+
+void OfflinePageBridge::Destroy(JNIEnv*, jobject) {
+  delete this;
+}
+
+static jlong Init(JNIEnv* env, jobject obj, jobject j_profile) {
+  return reinterpret_cast<jlong>(new OfflinePageBridge(
+      env, obj, ProfileAndroid::FromProfileAndroid(j_profile)));
+}
+
+bool RegisterOfflinePageBridge(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace android
+}  // namespace offline_pages
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.h b/chrome/browser/android/offline_pages/offline_page_bridge.h
new file mode 100644
index 0000000..ea61576
--- /dev/null
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.h
@@ -0,0 +1,48 @@
+// Copyright 2015 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.
+
+#ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BRIDGE_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BRIDGE_H_
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_weak_ref.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace offline_pages {
+
+class OfflinePageModel;
+
+namespace android {
+
+/**
+ * Bridge between C++ and Java for exposing native implementation of offline
+ * pages model in managed code.
+ */
+class OfflinePageBridge {
+ public:
+  OfflinePageBridge(JNIEnv* env,
+                    jobject obj,
+                    content::BrowserContext* browser_context);
+  void Destroy(JNIEnv*, jobject);
+
+ private:
+
+  JavaObjectWeakGlobalRef weak_java_ref_;
+  // Not owned.
+  OfflinePageModel* offline_page_model_;
+  // Not owned.
+  content::BrowserContext* browser_context_;
+  DISALLOW_COPY_AND_ASSIGN(OfflinePageBridge);
+};
+
+bool RegisterOfflinePageBridge(JNIEnv* env);
+
+}  // namespace android
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BRIDGE_H_
+
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 97fdae4..3517cdd4 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1362,6 +1362,8 @@
       'browser/offline_pages/offline_page_metadata_store_impl.h',
     ],
     'chrome_browser_bookmark_android_sources': [
+      'browser/android/offline_pages/offline_page_bridge.cc',
+      'browser/android/offline_pages/offline_page_bridge.h',
       'browser/android/offline_pages/offline_page_mhtml_archiver.cc',
       'browser/android/offline_pages/offline_page_mhtml_archiver.h',
       'browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc',
@@ -1759,6 +1761,7 @@
       'android/java/src/org/chromium/chrome/browser/infobar/DownloadOverwriteInfoBar.java',
       'android/java/src/org/chromium/chrome/browser/infobar/TranslateInfoBar.java',
       'android/java/src/org/chromium/chrome/browser/notifications/NotificationUIManager.java',
+      'android/java/src/org/chromium/chrome/browser/offline_pages/OfflinePageBridge.java',
       'android/java/src/org/chromium/chrome/browser/omnibox/AnswersImage.java',
       'android/java/src/org/chromium/chrome/browser/omnibox/AutocompleteController.java',
       'android/java/src/org/chromium/chrome/browser/omnibox/OmniboxPrerender.java',