Getting RenderWidgetHostViewWin ready for a GestureRecognizer.

ui/views/events/event.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/events/event.h"
 
 #include "base/logging.h"
 #include "ui/base/keycodes/keyboard_code_conversion.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/root_view.h"
@@ skipping 179 matching lines @@
 // This value matches windows WHEEL_DELTA.
 // static
 const int MouseWheelEvent::kWheelDelta = 120;
 #else
 // This value matches GTK+ wheel scroll amount.
 const int MouseWheelEvent::kWheelDelta = 53;
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////
 // GestureEvent, public:
+GestureEvent::GestureEvent(ui::EventType type,
+                           int x,
+                           int y,
+                           int flags,
+                           base::Time time_stamp,
+                           float delta_x,
+                           float delta_y,
+                           unsigned int touch_ids_bitfield)
+    : LocatedEvent(type, gfx::Point(x, y), flags),
+      delta_x_(delta_x),
+      delta_y_(delta_y),
+      touch_ids_bitfield_(touch_ids_bitfield) {
+  set_time_stamp(time_stamp);
+}
 
 GestureEvent::GestureEvent(const GestureEvent& model, View* source,
                            View* target)
     : LocatedEvent(model, source, target),
       delta_x_(model.delta_x_),
-      delta_y_(model.delta_y_) {
+      delta_y_(model.delta_y_),
+      touch_ids_bitfield_(model.touch_ids_bitfield_) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // GestureEvent, private:
 
 GestureEvent::GestureEvent(const GestureEvent& model, View* root)
     : LocatedEvent(model, root),
       delta_x_(model.delta_x_),
-      delta_y_(model.delta_y_) {
+      delta_y_(model.delta_y_),
+      touch_ids_bitfield_(0) {
 }
 
 GestureEvent::GestureEvent(ui::EventType type, int x, int y, int flags)
     : LocatedEvent(type, gfx::Point(x, y), flags),
       delta_x_(0),
-      delta_y_(0) {
+      delta_y_(0),
+      touch_ids_bitfield_(0) {
 }
 
 GestureEvent::~GestureEvent() {
 }
 
-#if !defined(USE_AURA)
 int GestureEvent::GetLowestTouchId() const {
-  // TODO:
-  return 0;
+  if (touch_ids_bitfield_ == 0)
+    return -1;
+  int i = -1;
+  // Find the index of the least significant 1 bit
+  while (!((1 << ++i) & touch_ids_bitfield_));
+  return i;
 }
-#endif
 
 GestureEventForTest::GestureEventForTest(ui::EventType type,
                                          int x,
                                          int y,
                                          int flags)
     : GestureEvent(type, x, y, flags) {
 }
 
 }  // namespace views