Clean up HID backend and API.

chrome/common/extensions/api/hid.idl

Index: chrome/common/extensions/api/hid.idl
diff --git a/chrome/common/extensions/api/hid.idl b/chrome/common/extensions/api/hid.idl
index 6923a3ab940329638f58a2be779d1e8f0933d089..d92a063d1c90de7ca91058e33c79e83ec2e5f93d 100644
--- a/chrome/common/extensions/api/hid.idl
+++ b/chrome/common/extensions/api/hid.idl
@@ -10,7 +10,7 @@ namespace hid {
   // Returned by <code>getDevices</code> functions to describes a connected HID
   // device. Use <code>connect</code> to connect to any of the returned devices.
   dictionary HidDeviceInfo {
-    DOMString path;
+    long deviceId;
     long vendorId;
     long productId;
   };
@@ -46,9 +46,9 @@ namespace hid {
                            GetDevicesCallback callback);
 
     // Open a connection to an HID device for communication.
-    // |deviceInfo|: The device to open.
+    // |deviceId|: The ID of the device to open.
     // |callback|: Invoked with an <code>HidConnectInfo</code>.
-    static void connect(HidDeviceInfo deviceInfo,
+    static void connect(long deviceId,
                         ConnectCallback callback);
 
     // Disconnect from a device. Invoking operations on a device after calling
@@ -74,18 +74,22 @@ namespace hid {
     // Control endpoint.
     //
     // |connectionId|: The connection to which to send a report.
+    // |reportId|: The report ID to use, or <code>0</code> if none.
     // |data|: The report data.
     // |callback|: The callback to invoke once the write is finished.
     static void send(long connectionId,
+                     long reportId,
                      ArrayBuffer data,
                      SendCallback callback);
 
     // Receive a Feature report from the device.
     //
     // |connectionId|: The connection to read Input report from.
+    // |reportId|: The report ID, or zero if none.
     // |size|: The size of the Feature report to receive.
     // |callback|: The callback to invoke once the write is finished.
     static void receiveFeatureReport(long connectionId,
+                                     long reportId,
                                      long size,
                                      ReceiveCallback callback);
 
@@ -94,9 +98,11 @@ namespace hid {
     // Feature reports are sent over the Control endpoint as a Set_Report
     // transfer.
     // |connectionId|: The connection to read Input report from.
+    // |reportId|: The report ID to use, or <code>0</code> if none.
     // |data|: The report data.
     // |callback|: The callback to invoke once the write is finished.
     static void sendFeatureReport(long connectionId,
+                                  long reportId,
                                   ArrayBuffer data,
                                   SendCallback callback);
   };