Require a mouse button release event before counting a press event as a new click.

ui/events/event.h

 // 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.
 
 #ifndef UI_EVENTS_EVENT_H_
 #define UI_EVENTS_EVENT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/event_types.h"
+#include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/gesture_event_details.h"
 #include "ui/events/gestures/gesture_types.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/events/latency_info.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/point_conversions.h"
 
@@ skipping 369 matching lines @@
 
   // Identifies the button that changed. During a press this corresponds to the
   // button that was pressed and during a release this corresponds to the button
   // that was released.
   // NOTE: during a press and release flags() contains the complete set of
   // flags. Use this to determine the button that was pressed or released.
   int changed_button_flags() const { return changed_button_flags_; }
   void set_changed_button_flags(int flags) { changed_button_flags_ = flags; }
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(EventTest, DoubleClickRequiresRelease);
+  FRIEND_TEST_ALL_PREFIXES(EventTest, SingleClickRightLeft);
+
   // Returns the repeat count based on the previous mouse click, if it is
   // recent enough and within a small enough distance.
   static int GetRepeatCount(const MouseEvent& click_event);
 
+  // Resets the last_click_event_ for unit tests.
+  static void ResetLastClickForTest();
+
   // See description above getter for details.
   int changed_button_flags_;
 
   static MouseEvent* last_click_event_;
+
+  // We can create a MouseEvent for a native event more than once. We set this
+  // to true when the next event either has a different timestamp or we see a
+  // release signalling that the press (click) event was completed.
+  static bool last_click_complete_;
 };
 
 class ScrollEvent;
 
 class EVENTS_EXPORT MouseWheelEvent : public MouseEvent {
  public:
   // See |offset| for details.
   static const int kWheelDelta;
 
   explicit MouseWheelEvent(const base::NativeEvent& native_event);
@@ skipping 260 matching lines @@
 
   const GestureEventDetails& details() const { return details_; }
 
  private:
   GestureEventDetails details_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_