Fix 'repeat' state of a DOM KeyboardEvent on Windows

content/browser/renderer_host/input/web_input_event_builders_win.cc

Index: content/browser/renderer_host/input/web_input_event_builders_win.cc
diff --git a/content/browser/renderer_host/input/web_input_event_builders_win.cc b/content/browser/renderer_host/input/web_input_event_builders_win.cc
index 19e8fc617710be0e013ccb54ac325b041f8cd77e..73c9174bfe4d946f77b160f93fe54f3146aa57b6 100644
--- a/content/browser/renderer_host/input/web_input_event_builders_win.cc
+++ b/content/browser/renderer_host/input/web_input_event_builders_win.cc
@@ -160,7 +160,9 @@ WebKeyboardEvent WebKeyboardEventBuilder::Build(HWND hwnd,
   // NOTE: There doesn't seem to be a way to query the mouse button state in
   // this case.
 
-  if (LOWORD(lparam) > 1)
+  // Bit 30 of lParam represents the "previous key state". If set, the key was
+  // already down, therefore this is an auto-repeat.
+  if (lparam & 0x40000000)
     result.modifiers |= WebInputEvent::IsAutoRepeat;
 
   result.modifiers |= GetLocationModifier(wparam, lparam);