Bluetooth: Send UI notifications when the connecting status changes.

This fix sends a DeviceChanged notification to all the
BluetoothAdapter::Observer when a BluetoothDevice::Connect makes the
BluetoothDevice::IsConnecting property change.

BUG=231985
TEST=None

Review URL: https://chromiumcodereview.appspot.com/12374062

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195375 0039d316-1c4b-4281-b951-d872f2087c98

device/bluetooth/bluetooth_adapter_chromeos.cc

@@ -234,6 +234,14 @@ void BluetoothAdapterChromeOS::PoweredChanged(bool powered) {
                     AdapterPoweredChanged(this, powered_));
 }
 
+void BluetoothAdapterChromeOS::NotifyDeviceChanged(
+    BluetoothDeviceChromeOS* device) {
+  DCHECK(device->adapter_ == this);
+
+  FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
+                    DeviceChanged(this, device));
+}
+
 void BluetoothAdapterChromeOS::OnStartDiscovery(
     const base::Closure& callback,
     const ErrorCallback& error_callback,
@@ -366,10 +374,9 @@ void BluetoothAdapterChromeOS::UpdateDevice(
   }
   device->Update(properties, true);
 
-  if (update_device) {
-    FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
-                      DeviceChanged(this, device));
-  } else {
+  if (update_device)
+    NotifyDeviceChanged(device);
+  else {
     FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
                       DeviceAdded(this, device));
   }
@@ -428,8 +435,7 @@ void BluetoothAdapterChromeOS::DeviceRemoved(
       VLOG(1) << "Removed object path from device " << device->GetAddress();
       device->RemoveObjectPath();
 
-      FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
-                        DeviceChanged(this, device));
+      NotifyDeviceChanged(device);
     }
   }
 }
@@ -485,10 +491,9 @@ void BluetoothAdapterChromeOS::DeviceFound(
   device->SetDiscovered(true);
   device->Update(&properties, false);
 
-  if (update_device) {
-    FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
-                      DeviceChanged(this, device));
-  } else {
+  if (update_device)
+    NotifyDeviceChanged(device);
+  else {
     FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
                       DeviceAdded(this, device));
   }
@@ -524,8 +529,7 @@ void BluetoothAdapterChromeOS::DeviceDisappeared(
             << " is no longer visible to the adapter";
     device->SetDiscovered(false);
 
-    FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
-                      DeviceChanged(this, device));
+    NotifyDeviceChanged(device);
   }
 }
 

device/bluetooth/bluetooth_adapter_chromeos.h

@@ -109,6 +109,10 @@ class BluetoothAdapterChromeOS
   // and directly using values obtained from properties.
   void PoweredChanged(bool powered);
 
+  // Notifies observers of a change in the device |device|. Used to signal
+  // changes initiated from the BluetoothDeviceChromeOS itself.
+  void NotifyDeviceChanged(BluetoothDeviceChromeOS* device);
+
   // Called by BluetoothAdapterClient in response to the method call sent
   // by StartDiscovering(), |callback| and |error_callback| are the callbacks
   // provided to that method.

device/bluetooth/bluetooth_device_chromeos.cc

@@ -148,6 +148,10 @@ void BluetoothDeviceChromeOS::Connect(
   // This is safe because Connect() and its callbacks are called in the same
   // thread.
   connecting_calls_++;
+  if (!connecting_) {
+    connecting_ = true;
+    adapter_->NotifyDeviceChanged(this);
+  }
   connecting_ = !!connecting_calls_;
   // Set the decrement to be issued when either callback is called.
   base::Closure wrapped_callback = base::Bind(
@@ -535,18 +539,22 @@ void BluetoothDeviceChromeOS::OnGetServiceRecordsError(
 void BluetoothDeviceChromeOS::OnConnectCallbackCalled(
     const base::Closure& callback) {
   // Update the connecting status.
+  bool prev_connecting = connecting_;
   connecting_calls_--;
   connecting_ = !!connecting_calls_;
   callback.Run();
+  if (prev_connecting != connecting_) adapter_->NotifyDeviceChanged(this);
 }
 
 void BluetoothDeviceChromeOS::OnConnectErrorCallbackCalled(
     const ConnectErrorCallback& error_callback,
     enum ConnectErrorCode error_code) {
   // Update the connecting status.
+  bool prev_connecting = connecting_;
   connecting_calls_--;
   connecting_ = !!connecting_calls_;
   error_callback.Run(error_code);
+  if (prev_connecting != connecting_) adapter_->NotifyDeviceChanged(this);
 }
 
 void BluetoothDeviceChromeOS::ConnectApplications(