Linux native notifications: Add suppress-sound hint when notification is silent

BUG=676220
R=peter@chromium.org
CC=thestig@chromium.org

Change-Id: I20a4a246b89f8be56bfdffcbfb7b7c38be203eaa
Reviewed-on: https://chromium-review.googlesource.com/687887
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505165}

chrome/browser/notifications/notification_platform_bridge_linux.cc

@@ -620,6 +620,14 @@ class NotificationPlatformBridgeLinuxImpl
         NotificationPriorityToFdoUrgency(notification->priority()));
     hints_writer.CloseContainer(&urgency_writer);
 
+    if (notification->silent()) {
+      dbus::MessageWriter suppress_sound_writer(nullptr);
+      hints_writer.OpenDictEntry(&suppress_sound_writer);
+      suppress_sound_writer.AppendString("suppress-sound");
+      suppress_sound_writer.AppendVariantOfBool(true);
+      hints_writer.CloseContainer(&suppress_sound_writer);
+    }
+
     std::unique_ptr<base::Environment> env = base::Environment::Create();
     base::FilePath desktop_file(
         shell_integration_linux::GetDesktopName(env.get()));

chrome/browser/notifications/notification_platform_bridge_linux_unittest.cc

@@ -84,6 +84,11 @@ class NotificationBuilder {
     return *this;
   }
 
+  NotificationBuilder& SetSilent(bool silent) {
+    notification_.set_silent(silent);
+    return *this;
+  }
+
   NotificationBuilder& SetTitle(const base::string16& title) {
     notification_.set_title(title);
     return *this;
@@ -102,6 +107,7 @@ struct NotificationRequest {
   std::string summary;
   std::string body;
   int32_t expire_timeout = 0;
+  bool silent = false;
 };
 
 const SkBitmap CreateBitmap(int width, int height) {
@@ -147,7 +153,13 @@ NotificationRequest ParseRequest(dbus::MethodCall* method_call) {
       EXPECT_TRUE(hints_reader.PopDictEntry(&dict_entry_reader));
       EXPECT_TRUE(dict_entry_reader.PopString(&str));
       dbus::MessageReader variant_reader(nullptr);
+      if (str == "suppress-sound") {
+        bool suppress_sound;
+        EXPECT_TRUE(dict_entry_reader.PopVariantOfBool(&suppress_sound));
+        request.silent = suppress_sound;
+      } else {
         EXPECT_TRUE(dict_entry_reader.PopVariant(&variant_reader));
+      }
       EXPECT_FALSE(dict_entry_reader.HasMoreData());
     }
   }
@@ -485,3 +497,26 @@ TEST_F(NotificationPlatformBridgeLinuxTest, EscapeHtml) {
           .GetResult(),
       nullptr);
 }
+
+TEST_F(NotificationPlatformBridgeLinuxTest, Silent) {
+  EXPECT_CALL(*mock_notification_proxy_.get(),
+              CallMethodAndBlock(Calls("Notify"), _))
+      .WillOnce(OnNotify(
+          [=](const NotificationRequest& request) {
+            EXPECT_FALSE(request.silent);
+          },
+          1))
+      .WillOnce(OnNotify(
+          [=](const NotificationRequest& request) {
+            EXPECT_TRUE(request.silent);
+          },
+          2));
+
+  CreateNotificationBridgeLinux();
+  notification_bridge_linux_->Display(
+      NotificationCommon::PERSISTENT, "", "", false,
+      NotificationBuilder("1").SetSilent(false).GetResult(), nullptr);
+  notification_bridge_linux_->Display(
+      NotificationCommon::PERSISTENT, "", "", false,
+      NotificationBuilder("2").SetSilent(true).GetResult(), nullptr);
+}