Move device/usb classes from the FILE thread to UI thread.

chrome/browser/devtools/device/usb/android_usb_device.h

Index: chrome/browser/devtools/device/usb/android_usb_device.h
diff --git a/chrome/browser/devtools/device/usb/android_usb_device.h b/chrome/browser/devtools/device/usb/android_usb_device.h
index 3400a977dcaabdc5b5edca1d311582c63b5bd55a..f62ca8708f7ff41bd37cfa7a67523357bad41778 100644
--- a/chrome/browser/devtools/device/usb/android_usb_device.h
+++ b/chrome/browser/devtools/device/usb/android_usb_device.h
@@ -15,7 +15,7 @@
 #include "device/usb/usb_device_handle.h"
 
 namespace base {
-class MessageLoop;
+class SingleThreadTaskRunner;
 }
 
 namespace crypto {
@@ -68,11 +68,10 @@ typedef base::Callback<void(const AndroidUsbDevices&)>
 
 class AndroidUsbDevice : public base::RefCountedThreadSafe<AndroidUsbDevice> {
  public:
+  static void CountDevices(const base::Callback<void(int)>& callback);
   static void Enumerate(crypto::RSAPrivateKey* rsa_key,
                         const AndroidUsbDevicesCallback& callback);
 
-  static void CountDevices(const base::Callback<void(int)>& callback);
-
   AndroidUsbDevice(crypto::RSAPrivateKey* rsa_key,
                    scoped_refptr<device::UsbDeviceHandle> device,
                    const std::string& serial,
@@ -102,11 +101,20 @@ class AndroidUsbDevice : public base::RefCountedThreadSafe<AndroidUsbDevice> {
 
   void Queue(scoped_ptr<AdbMessage> message);
   void ProcessOutgoing();
-  void OutgoingMessageSent(device::UsbTransferStatus status,
-                           scoped_refptr<net::IOBuffer> buffer,
-                           size_t result);
+  static void OutgoingMessageSent(
+      base::WeakPtr<AndroidUsbDevice> device,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      device::UsbTransferStatus status,
+      scoped_refptr<net::IOBuffer> buffer,
+      size_t result);
 
   void ReadHeader();
+  static void ReceivedHeader(
+      base::WeakPtr<AndroidUsbDevice> device,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      device::UsbTransferStatus status,
+      scoped_refptr<net::IOBuffer> buffer,
+      size_t result);
   void ParseHeader(device::UsbTransferStatus status,
                    scoped_refptr<net::IOBuffer> buffer,
                    size_t result);
@@ -114,6 +122,15 @@ class AndroidUsbDevice : public base::RefCountedThreadSafe<AndroidUsbDevice> {
   void ReadBody(scoped_ptr<AdbMessage> message,
                 uint32 data_length,
                 uint32 data_check);
+  static void ReceivedBody(
+      base::WeakPtr<AndroidUsbDevice> device,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      scoped_ptr<AdbMessage> message,
+      uint32 data_length,
+      uint32 data_check,
+      device::UsbTransferStatus status,
+      scoped_refptr<net::IOBuffer> buffer,
+      size_t result);
   void ParseBody(scoped_ptr<AdbMessage> message,
                  uint32 data_length,
                  uint32 data_check,
@@ -130,7 +147,7 @@ class AndroidUsbDevice : public base::RefCountedThreadSafe<AndroidUsbDevice> {
 
   void SocketDeleted(uint32 socket_id);
 
-  base::MessageLoop* message_loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   scoped_ptr<crypto::RSAPrivateKey> rsa_key_;