Fix CodeForKeyboardEvent to properly calculate the scancode.

Current code just uses the key_event.nativeKeyCode which is copied
from the Windows' lParam. The proper scancode needs to be shifted
and masked out of the lParam (as is done for UsbKeyCodeForKeyboardEvent.

BUG=325015

Review URL: https://codereview.chromium.org/100533003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238362 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/pepper/usb_key_code_conversion_win.cc

@@ -23,8 +23,13 @@ uint32_t UsbKeyCodeForKeyboardEvent(const WebKeyboardEvent& key_event) {
 }
 
 const char* CodeForKeyboardEvent(const WebKeyboardEvent& key_event) {
+  // Extract the scancode and extended bit from the native key event's lParam.
+  int scancode = (key_event.nativeKeyCode >> 16) & 0x000000FF;
+  if ((key_event.nativeKeyCode & (1 << 24)) != 0)
+    scancode |= 0xe000;
+
   ui::KeycodeConverter* key_converter = ui::KeycodeConverter::GetInstance();
-  return key_converter->NativeKeycodeToCode(key_event.nativeKeyCode);
+  return key_converter->NativeKeycodeToCode(scancode);
 }
 
 }  // namespace content