Implement a modal permission dialog on Android gated by a feature.

chrome/browser/permissions/permission_dialog_delegate.cc

+// Copyright 2016 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/permissions/permission_dialog_delegate.h"
+
+#include <utility>
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/feature_list.h"
+#include "build/build_config.h"
+#include "chrome/browser/android/resource_mapper.h"
+#include "chrome/browser/geolocation/geolocation_infobar_delegate_android.h"
+#include "chrome/browser/media/midi_permission_infobar_delegate_android.h"
+#include "chrome/browser/media/protected_media_identifier_infobar_delegate_android.h"
+#include "chrome/browser/notifications/notification_permission_infobar_delegate.h"
+#include "chrome/common/chrome_features.h"
+#include "components/variations/variations_associated_data.h"
+#include "content/public/browser/android/content_view_core.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/PermissionDialogController_jni.h"
+#include "jni/PermissionDialogDelegate_jni.h"
+#include "ui/android/window_android.h"
+#include "ui/base/window_open_disposition.h"
+
+using base::android::ConvertUTF16ToJavaString;
+
+namespace {
+
+// Key for querying variations for whether a modal should require a gesture.
+const char kModalParamsUserGestureKey[] = "require_gesture";
+
+}
+
+// static
+void PermissionDialogDelegate::Create(
+    content::PermissionType type,
+    content::WebContents* web_contents,
+    const GURL& requesting_frame,
+    bool user_gesture,
+    Profile* profile,
+    const PermissionSetCallback& callback) {
+  DCHECK(web_contents);
+
+  std::unique_ptr<PermissionInfoBarDelegate> infobar_delegate = nullptr;
+  switch (type) {
+    case content::PermissionType::GEOLOCATION:
+      infobar_delegate.reset(new GeolocationInfoBarDelegateAndroid(
+          requesting_frame, user_gesture, profile, callback));
+      break;
+#if defined(ENABLE_NOTIFICATIONS)
+    case content::PermissionType::NOTIFICATIONS:
+    case content::PermissionType::PUSH_MESSAGING:
+      infobar_delegate.reset(new NotificationPermissionInfoBarDelegate(
+              requesting_frame, user_gesture, profile, callback));

[gone, 2016/10/27 20:33:35]

indentation is off here and below

[dominickn, 2016/10/27 23:37:13]

Done.

+      break;
+#endif  // ENABLE_NOTIFICATIONS
+    case content::PermissionType::MIDI_SYSEX:
+      infobar_delegate.reset(new MidiPermissionInfoBarDelegateAndroid(
+          requesting_frame, user_gesture, profile, callback));
+      break;
+    case content::PermissionType::PROTECTED_MEDIA_IDENTIFIER:
+      infobar_delegate.reset(new ProtectedMediaIdentifierInfoBarDelegateAndroid(
+              requesting_frame, user_gesture, profile, callback));
+      break;
+    default:
+      NOTREACHED();
+  }
+
+  PermissionDialogDelegate* dialog_delegate =
+      new PermissionDialogDelegate(web_contents, std::move(infobar_delegate));
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  base::android::ScopedJavaLocalRef<jobject> j_delegate =
+      dialog_delegate->CreateJavaDelegate(env);
+
+  // Java queues the dialog request if neccesary, and owns the the lifetime of
+  // the delegate.

[gone, 2016/10/27 20:33:35]

Comment needs reworking.  Not sure you can own the lifetime of a delegate
either...  Manages the lifecycle of the java delegate?  The native delegate?

[dominickn, 2016/10/27 23:37:13]

Done.

+  Java_PermissionDialogController_createDialog(env, j_delegate.obj());
+}
+
+// static
+bool PermissionDialogDelegate::ShouldShowModalPrompt(bool has_user_gesture) {
+  if (!base::FeatureList::IsEnabled(features::kModalPermissionPrompts))
+    return false;
+
+  // Enforce a user gesture requirement by default. Only relax this if
+  // variations has a require_gesture key, and that key is one of 0 or false.
+  std::string require_gesture = variations::GetVariationParamValueByFeature(
+      features::kModalPermissionPrompts, kModalParamsUserGestureKey);
+  if (require_gesture == "0" || require_gesture == "false")
+    return true;
+  return has_user_gesture;
+}
+
+// static
+bool PermissionDialogDelegate::RegisterPermissionDialogDelegate(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+ScopedJavaLocalRef<jobject> PermissionDialogDelegate::CreateJavaDelegate(
+    JNIEnv* env) {
+  content::ContentViewCore* cvc =
+      content::ContentViewCore::FromWebContents(web_contents());
+  DCHECK(cvc);
+
+  return Java_PermissionDialogDelegate_create(
+      env, reinterpret_cast<uintptr_t>(this),
+      cvc->GetWindowAndroid()->GetJavaObject(),
+      ResourceMapper::MapFromChromiumId(infobar_delegate_->GetIconId()),
+      ConvertUTF16ToJavaString(env, infobar_delegate_->GetMessageText()),
+      ConvertUTF16ToJavaString(env, infobar_delegate_->GetLinkText()),
+      ConvertUTF16ToJavaString(env, infobar_delegate_->GetButtonLabel(
+                                        PermissionInfoBarDelegate::BUTTON_OK)),
+      ConvertUTF16ToJavaString(env,
+                               infobar_delegate_->GetButtonLabel(
+                                   PermissionInfoBarDelegate::BUTTON_CANCEL)),
+      infobar_delegate_->ShouldShowPersistenceToggle());
+}
+
+void PermissionDialogDelegate::Accept(JNIEnv* env,
+                                      const JavaParamRef<jobject>& obj,
+                                      jboolean persist) {
+  if (infobar_delegate_->ShouldShowPersistenceToggle())
+    infobar_delegate_->set_persist(persist);
+  infobar_delegate_->Accept();
+}
+
+void PermissionDialogDelegate::Cancel(JNIEnv* env,
+                                      const JavaParamRef<jobject>& obj,
+                                      jboolean persist) {
+  if (infobar_delegate_->ShouldShowPersistenceToggle())
+    infobar_delegate_->set_persist(persist);
+  infobar_delegate_->Cancel();
+}
+
+void PermissionDialogDelegate::Dismissed(JNIEnv* env,
+                                         const JavaParamRef<jobject>& obj) {
+  infobar_delegate_->InfoBarDismissed();
+}
+
+void PermissionDialogDelegate::LinkClicked(JNIEnv* env,
+                                           const JavaParamRef<jobject>& obj) {
+  // Don't call delegate_->LinkClicked() because that relies on having an
+  // InfoBarService as an owner() to open the link. That will fail since the
+  // wrapped delegate has no owner (is hasn't been added as an infobar).

[gone, 2016/10/27 20:33:35]

is hasn't

[dominickn, 2016/10/27 23:37:13]

Done.

+  if (web_contents()) {
+    web_contents()->OpenURL(content::OpenURLParams(
+        infobar_delegate_->GetLinkURL(), content::Referrer(),
+        WindowOpenDisposition::NEW_FOREGROUND_TAB, ui::PAGE_TRANSITION_LINK,
+        false));
+  }
+}
+
+void PermissionDialogDelegate::Destroy(JNIEnv* env,
+                                       const JavaParamRef<jobject>& obj) {
+  delete this;
+}
+
+PermissionDialogDelegate::PermissionDialogDelegate(
+    content::WebContents* web_contents,
+    std::unique_ptr<PermissionInfoBarDelegate> infobar_delegate)
+    : content::WebContentsObserver(web_contents),
+      infobar_delegate_(std::move(infobar_delegate)) {
+  DCHECK(infobar_delegate_);
+}
+
+PermissionDialogDelegate::~PermissionDialogDelegate() {}