renderer: implement multiple permission requesting

chrome/browser/permissions/permission_manager.cc

Index: chrome/browser/permissions/permission_manager.cc
diff --git a/chrome/browser/permissions/permission_manager.cc b/chrome/browser/permissions/permission_manager.cc
index 7ef2d83786bde92216bda897453ea1f5473b5d0c..db131e0f5fcaf0fca1c2bd1a963bdee60e33f5ea 100644
--- a/chrome/browser/permissions/permission_manager.cc
+++ b/chrome/browser/permissions/permission_manager.cc
@@ -78,6 +78,23 @@ void PermissionStatusCallbackWrapper(
 
 }  // anonymous namespace
 
+struct PermissionManager::PendingResponse {

[Lalit Maganti (personal), 2015/08/03 23:10:26]

Move to header and keep implementation here.

+  bool responded;
+  PermissionType type;
+  PermissionStatus status;
+
+  PendingResponse(bool responded, PermissionType type, PermissionStatus status)
+      : responded(responded), type(type), status(status) {
+  }
+};
+
+struct PermissionManager::PendingResponses {

[Lalit Maganti (personal), 2015/08/03 23:10:26]

Ditto.

+  GURL requesting_origin;
+  size_t count;

[Lalit Maganti (personal), 2015/08/03 23:10:26]

Make this immutable and another field.

+  std::vector<PendingResponse> responses;
+  base::Callback<void(const StatusVector&)> callback;
+};
+
 struct PermissionManager::Subscription {
   PermissionType permission;
   GURL requesting_origin;
@@ -87,7 +104,8 @@ struct PermissionManager::Subscription {
 };
 
 PermissionManager::PermissionManager(Profile* profile)
-    : profile_(profile) {
+    : profile_(profile),
+      weak_ptr_factory_(this) {
 }
 
 PermissionManager::~PermissionManager() {
@@ -122,6 +140,76 @@ void PermissionManager::RequestPermission(
                  callback));
 }
 
+void PermissionManager::RequestPermissions(
+    const std::vector<PermissionType>& permissions,
+    content::RenderFrameHost* render_frame_host,
+    int request_id,
+    const GURL& requesting_origin,
+    bool user_gesture,
+    const base::Callback<void(const StatusVector&)>& callback) {
+  int render_process_id = render_frame_host->GetProcess()->GetID();
+  int render_frame_id = render_frame_host->GetRoutingID();
+  const PermissionRequestID request(render_process_id,
+                                    render_frame_id,
+                                    request_id,
+                                    requesting_origin);
+
+  // Pass complete control of the scoped pointer to the map.
+  // Locally we will use the raw pointer and the response will be removed from
+  // the map once all the responses return.
+  scoped_ptr<PendingResponses> scoped_response(new PendingResponses());
+  PendingResponses *pending_responses = scoped_response.get();

[Lalit Maganti (personal), 2015/08/03 23:10:26]

Move *

+  pending_batch_responses_.add(request_id, scoped_response.Pass());
+
+  pending_responses->requesting_origin = requesting_origin;
+  pending_responses->count = permissions.size();
+  pending_responses->callback = callback;
+
+  for (size_t i = 0; i < permissions.size(); ++i) {
+    pending_responses->responses.emplace_back(
+        false,
+        permissions[i],
+        content::PERMISSION_STATUS_DENIED);
+
+    PermissionContextBase* context =
+        PermissionContext::Get(profile_, permissions[i]);
+    if (!context) {
+      OnRequestsResponse(callback, request, pending_responses, i,
+              CONTENT_SETTING_BLOCK);
+      continue;
+    }
+    context->RequestPermission(
+        content::WebContents::FromRenderFrameHost(render_frame_host),
+        request, requesting_origin, user_gesture,
+        base::Bind(&PermissionManager::OnRequestsResponse,
+                   weak_ptr_factory_.GetWeakPtr(),
+                   callback,
+                   request,
+                   pending_responses,
+                   i));
+  }
+}
+
+void PermissionManager::OnRequestsResponse(
+    const base::Callback<void(const StatusVector&)>& callback,
+    const PermissionRequestID request,
+    PendingResponses* pending_responses,
+    int index,
+    ContentSetting content_setting) {
+  PendingResponse& response = pending_responses->responses[index];
+  response.status = ContentSettingToPermissionStatus(content_setting);
+
+  if (--pending_responses->count == 0) {
+    std::vector<PermissionStatus> status;
+    for (auto response : pending_responses->responses) {
+      status.push_back(response.status);
+    }
+    callback.Run(status);

[Lalit Maganti (personal), 2015/08/03 23:10:26]

Move this after next line

+
+    pending_batch_responses_.erase(request.request_id());
+  }
+}
+
 void PermissionManager::CancelPermissionRequest(
     PermissionType permission,
     content::RenderFrameHost* render_frame_host,
@@ -142,6 +230,30 @@ void PermissionManager::CancelPermissionRequest(
       content::WebContents::FromRenderFrameHost(render_frame_host), request);
 }
 
+void PermissionManager::CancelPermissionsRequest(
+    content::RenderFrameHost* render_frame_host,
+    int request_id) {
+  PendingResponses* pending_responses =
+      pending_batch_responses_.get(request_id);
+
+  int render_process_id = render_frame_host->GetProcess()->GetID();
+  int render_frame_id = render_frame_host->GetRoutingID();
+  const PermissionRequestID request(render_process_id,
+                                    render_frame_id,
+                                    request_id,
+                                    pending_responses->requesting_origin);
+
+  for (size_t i = 0; i < pending_responses->count; ++i) {

[Lalit Maganti (personal), 2015/08/03 23:10:26]

This is totally wrong - we need to store actual and current count since this is
modifiable.

+    PermissionContextBase* context =
+        PermissionContext::Get(profile_, pending_responses->responses[i].type);
+    if (!context) continue;
+
+    context->CancelPermissionRequest(
+        content::WebContents::FromRenderFrameHost(render_frame_host), request);
+  }
+  pending_batch_responses_.clear();
+}
+
 void PermissionManager::ResetPermission(PermissionType permission,
                                         const GURL& requesting_origin,
                                         const GURL& embedding_origin) {