renderer: implement multiple permission requesting

content/browser/permissions/permission_service_impl.cc

Index: content/browser/permissions/permission_service_impl.cc
diff --git a/content/browser/permissions/permission_service_impl.cc b/content/browser/permissions/permission_service_impl.cc
index 795c93b471f24bd7970086f75932463501b7e01f..e14db59381f91229127f7ed183c5f0384b86a32b 100644
--- a/content/browser/permissions/permission_service_impl.cc
+++ b/content/browser/permissions/permission_service_impl.cc
@@ -5,6 +5,8 @@
 #include "content/browser/permissions/permission_service_impl.h"
 
 #include "base/bind.h"
+#include "content/browser/permissions/permission_pending_multiple_request.h"
+#include "content/browser/permissions/permission_pending_single_request.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/permission_manager.h"
 #include "content/public/browser/permission_type.h"
@@ -33,20 +35,6 @@ PermissionType PermissionNameToPermissionType(PermissionName name) {
 
 } // anonymous namespace
 
-PermissionServiceImpl::PendingRequest::PendingRequest(
-    PermissionType permission,
-    const GURL& origin,
-    const PermissionStatusCallback& callback)
-    : permission(permission),
-      origin(origin),
-      callback(callback) {
-}
-
-PermissionServiceImpl::PendingRequest::~PendingRequest() {
-  if (!callback.is_null())
-    callback.Run(PERMISSION_STATUS_ASK);
-}
-
 PermissionServiceImpl::PendingSubscription::PendingSubscription(
     PermissionType permission,
     const GURL& origin,
@@ -109,8 +97,11 @@ void PermissionServiceImpl::RequestPermission(
   }
 
   PermissionType permission_type = PermissionNameToPermissionType(permission);
-  int request_id = pending_requests_.Add(
-      new PendingRequest(permission_type, GURL(origin), callback));
+
+  PermissionPendingSingleRequest* request =
+      new PermissionPendingSingleRequest(
+          permission_type, GURL(origin), callback);
+  int request_id = pending_requests_.Add(request);
 
   browser_context->GetPermissionManager()->RequestPermission(
       permission_type,
@@ -120,19 +111,95 @@ void PermissionServiceImpl::RequestPermission(
       user_gesture, // TODO(mlamouri): should be removed (crbug.com/423770)
       base::Bind(&PermissionServiceImpl::OnRequestPermissionResponse,
                  weak_factory_.GetWeakPtr(),
-                 request_id));
+                 request_id,
+                 request));
+}
+
+void PermissionServiceImpl::RequestPermissions(
+    mojo::Array<PermissionName> permissions,
+    const mojo::String& origin,
+    bool user_gesture,
+    const PermissionsStatusCallback& callback) {
+  if (permissions.is_null()) {
+    callback.Run(mojo::Array<PermissionStatus>());
+    return;
+  }
+
+  // This condition is valid if the call is coming from a ChildThread instead of
+  // a RenderFrame. Some consumers of the service run in Workers and some in
+  // Frames. In the context of a Worker, it is not possible to show a
+  // permission prompt because there is no tab. In the context of a Frame, we
+  // can. Even if the call comes from a context where it is not possible to show
+  // any UI, we want to still return something relevant so the current
+  // permission status is returned for each permission.
+  if (!context_->render_frame_host()) {
+    mojo::Array<PermissionStatus> result(permissions.size());
+    for (size_t i = 0; i < permissions.size(); ++i) {
+      result[i] = GetPermissionStatusFromName(permissions[i], GURL(origin));
+    }
+    callback.Run(result.Pass());
+    return;
+  }
+
+  BrowserContext* browser_context = context_->GetBrowserContext();
+  DCHECK(browser_context);
+  if (!browser_context->GetPermissionManager()) {
+    mojo::Array<PermissionStatus> result(permissions.size());
+    for (size_t i = 0; i < permissions.size(); ++i) {
+      result[i] = PERMISSION_STATUS_DENIED;
+    }
+    callback.Run(result.Pass());
+    return;
+  }
+
+  std::vector<PermissionType> permission_types;
+  permission_types.reserve(permissions.size());
+  for (size_t i = 0; i < permissions.size(); ++i) {
+    permission_types.push_back(
+        PermissionNameToPermissionType(permissions[i]));
+  }
+  PermissionPendingMultipleRequest* request =
+      new PermissionPendingMultipleRequest(callback, permissions.size());
+  int request_id = pending_requests_.Add(request);
+
+  browser_context->GetPermissionManager()->RequestPermissions(
+      permission_types,
+      context_->render_frame_host(),
+      request_id,
+      GURL(origin),
+      user_gesture, // TODO(mlamouri): should be removed (crbug.com/423770)
+      base::Bind(&PermissionServiceImpl::OnRequestPermissionsResponse,
+                 weak_factory_.GetWeakPtr(),
+                 request_id,
+                 request));
 }
 
 void PermissionServiceImpl::OnRequestPermissionResponse(
     int request_id,
+    PermissionPendingSingleRequest* request,
     PermissionStatus status) {
-  PendingRequest* request = pending_requests_.Lookup(request_id);
   PermissionStatusCallback callback(request->callback);
   request->callback.reset();
   pending_requests_.Remove(request_id);
+
   callback.Run(status);
 }
 
+void PermissionServiceImpl::OnRequestPermissionsResponse(
+    int request_id,
+    PermissionPendingMultipleRequest* request,
+    const std::vector<PermissionStatus>& status) {
+  PermissionsStatusCallback callback(request->callback);
+  request->callback.reset();
+  pending_requests_.Remove(request_id);
+
+  mojo::Array<PermissionStatus> status_array(status.size());
+  for (size_t i = 0; i < status.size(); i++) {
+    status_array[i] = status[i];
+  }
+  callback.Run(status_array.Pass());
+}
+
 void PermissionServiceImpl::CancelPendingOperations() {
   DCHECK(context_->render_frame_host());
   DCHECK(context_->GetBrowserContext());
@@ -143,13 +210,11 @@ void PermissionServiceImpl::CancelPendingOperations() {
     return;
 
   // Cancel pending requests.
-  for (RequestsMap::Iterator<PendingRequest> it(&pending_requests_);
+  for (RequestsMap::Iterator<PermissionPendingRequest> it(&pending_requests_);
        !it.IsAtEnd(); it.Advance()) {
-    permission_manager->CancelPermissionRequest(
-        it.GetCurrentValue()->permission,
-        context_->render_frame_host(),
-        it.GetCurrentKey(),
-        it.GetCurrentValue()->origin);
+    it.GetCurrentValue()->Cancel(permission_manager,
+                                 context_->render_frame_host(),
+                                 it.GetCurrentKey());
   }
   pending_requests_.Clear();