arc: bluetooth: Forward the MTU received to android

Two relevant patches are ag/4013275 and crosreview.com/1043496.

Bug: b:78593133
Test: Pass test CtsVerifier test on MTU exchange
Change-Id: I527dee3d105d3b3db744f550c2c7003789d65c57
CQ-DEPEND: CL:1050621
Reviewed-on: https://chromium-review.googlesource.com/1058328Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Commit-Queue: Qiyu Hu <qiyuh@google.com>
Cr-Commit-Position: refs/heads/master@{#558735}

chrome/browser/chromeos/arc/bluetooth/arc_bluetooth_bridge.cc

@@ -559,6 +559,17 @@ void ArcBluetoothBridge::DevicePairedChanged(BluetoothAdapter* adapter,
   }
 }
 
+void ArcBluetoothBridge::DeviceMTUChanged(BluetoothAdapter* adapter,
+                                          BluetoothDevice* device,
+                                          uint16_t mtu) {
+  auto* bluetooth_instance = ARC_GET_INSTANCE_FOR_METHOD(
+      arc_bridge_service_->bluetooth(), OnMTUReceived);
+  if (!device->IsConnected() || bluetooth_instance == nullptr)
+    return;
+  bluetooth_instance->OnMTUReceived(
+      mojom::BluetoothAddress::From(device->GetAddress()), mtu);
+}
+
 void ArcBluetoothBridge::DeviceRemoved(BluetoothAdapter* adapter,
                                        BluetoothDevice* device) {
   if (!IsInstanceUp())

chrome/browser/chromeos/arc/bluetooth/arc_bluetooth_bridge.h

@@ -94,6 +94,10 @@ class ArcBluetoothBridge
                            device::BluetoothDevice* device,
                            bool new_paired_status) override;
 
+  void DeviceMTUChanged(device::BluetoothAdapter* adapter,
+                        device::BluetoothDevice* device,
+                        uint16_t mtu) override;
+
   void DeviceRemoved(device::BluetoothAdapter* adapter,
                      device::BluetoothDevice* device) override;
 

components/arc/common/bluetooth.mojom

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Next MinVersion: 10
+// Next MinVersion: 11
 
 module arc.mojom;
 
@@ -405,7 +405,7 @@ interface BluetoothHost {
       => (BluetoothGattStatus status);
 };
 
-// Next Method ID: 19
+// Next Method ID: 20
 interface BluetoothInstance {
   // DEPRECATED: Please use Init@18 instead.
   InitDeprecated@0(BluetoothHost host_ptr);
@@ -465,10 +465,11 @@ interface BluetoothInstance {
       array<uint8> value,
       [MinVersion=9] BluetoothGattDBAttributeType attribute_type)
       => (BluetoothGattStatus status);
+  [MinVersion=10] OnMTUReceived@19(BluetoothAddress remote_addr, uint16 mtu);
 
   // Bluetooth SDP function
   [MinVersion=5] OnGetSdpRecords@17(BluetoothStatus status,
-                                    BluetoothAddress remove_addr,
+                                    BluetoothAddress remote_addr,
                                     BluetoothUUID target_uuid,
                                     array<BluetoothSdpRecord> records);
 };

components/arc/test/fake_bluetooth_instance.cc

@@ -126,8 +126,12 @@ void FakeBluetoothInstance::RequestGattWrite(
 
 void FakeBluetoothInstance::OnGetSdpRecords(
     mojom::BluetoothStatus status,
-    mojom::BluetoothAddressPtr remove_addr,
+    mojom::BluetoothAddressPtr remote_addr,
     const device::BluetoothUUID& target_uuid,
     std::vector<mojom::BluetoothSdpRecordPtr> records) {}
 
+void FakeBluetoothInstance::OnMTUReceived(
+    mojom::BluetoothAddressPtr remote_addr,
+    uint16_t mtu) {}
+
 }  // namespace arc

components/arc/test/fake_bluetooth_instance.h

@@ -128,10 +128,13 @@ class FakeBluetoothInstance : public mojom::BluetoothInstance {
 
   void OnGetSdpRecords(
       mojom::BluetoothStatus status,
-      mojom::BluetoothAddressPtr remove_addr,
+      mojom::BluetoothAddressPtr remote_addr,
       const device::BluetoothUUID& target_uuid,
       std::vector<mojom::BluetoothSdpRecordPtr> records) override;
 
+  void OnMTUReceived(mojom::BluetoothAddressPtr remote_addr,
+                     uint16_t mtu) override;
+
   const std::vector<std::vector<mojom::BluetoothPropertyPtr>>&
   device_found_data() const {
     return device_found_data_;