Clean up HID backend and API.

chrome/browser/extensions/api/hid/hid_api.h

Index: chrome/browser/extensions/api/hid/hid_api.h
diff --git a/chrome/browser/extensions/api/hid/hid_api.h b/chrome/browser/extensions/api/hid/hid_api.h
index 3a443c217043e65ee13d5a85ead5052b87261b91..09ed2944cd61556587bf790b9367bc753be41b89 100644
--- a/chrome/browser/extensions/api/hid/hid_api.h
+++ b/chrome/browser/extensions/api/hid/hid_api.h
@@ -17,7 +17,7 @@
 
 namespace net {
 
-class IOBuffer;
+class IOBufferWithSize;
 
 }  // namespace net
 
@@ -116,7 +116,7 @@ class HidReceiveFunction : public HidAsyncApiFunction {
 
   void OnFinished(bool success, size_t bytes);
 
-  scoped_refptr<net::IOBuffer> buffer_;
+  scoped_refptr<net::IOBufferWithSize> buffer_;
   scoped_ptr<base::ListValue> result_;
   scoped_ptr<extensions::api::hid::Receive::Params> parameters_;
 
@@ -160,7 +160,7 @@ class HidReceiveFeatureReportFunction : public HidAsyncApiFunction {
 
   void OnFinished(bool success, size_t bytes);
 
-  scoped_refptr<net::IOBuffer> buffer_;
+  scoped_refptr<net::IOBufferWithSize> buffer_;
   scoped_ptr<base::ListValue> result_;
   scoped_ptr<extensions::api::hid::ReceiveFeatureReport::Params> parameters_;