Get horizontal wheel scrolling working again with logitech drivers.

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
===================================================================
--- ui/views/win/hwnd_message_handler.cc	(revision 263028)
+++ ui/views/win/hwnd_message_handler.cc	(working copy)
@@ -359,7 +359,8 @@
       id_generator_(0),
       needs_scroll_styles_(false),
       in_size_loop_(false),
-      touch_down_context_(false) {
+      touch_down_context_(false),
+      last_mouse_hwheel_time_(0) {
 }
 
 HWNDMessageHandler::~HWNDMessageHandler() {
@@ -2315,6 +2316,18 @@
       return 0;
   }
 
+  // Certain logitech drivers send the WM_MOUSEHWHEEL message to the parent
+  // followed by WM_MOUSEWHEEL messages to the child window causing a vertical
+  // scroll. We treat these WM_MOUSEWHEEL messages as WM_MOUSEHWHEEL
+  // messages.
+  if (message == WM_MOUSEHWHEEL)
+    last_mouse_hwheel_time_ = ::GetMessageTime();
+
+  if (message == WM_MOUSEWHEEL &&
+      ::GetMessageTime() == last_mouse_hwheel_time_) {
+    message = WM_MOUSEHWHEEL;
+  }
+
   if (message == WM_RBUTTONUP && is_right_mouse_pressed_on_caption_) {
     is_right_mouse_pressed_on_caption_ = false;
     ReleaseCapture();