Mac: Consolidate test mouse event generation into a single codepath.

ui/events/test/cocoa_test_event_utils.h

 // Copyright 2014 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_TEST_COCOA_TEST_EVENT_UTILS_H_
 #define UI_EVENTS_TEST_COCOA_TEST_EVENT_UTILS_H_
 
 #import <Cocoa/Cocoa.h>
 #import <objc/objc-class.h>
 
@@ skipping 32 matching lines @@
 // Return a mouse down and an up event with the given |clickCount| at
 // |view|'s midpoint.
 std::pair<NSEvent*, NSEvent*> MouseClickInView(NSView* view,
                                                NSUInteger clickCount);
 
 // Return a right mouse down and an up event with the given |clickCount| at
 // |view|'s midpoint.
 std::pair<NSEvent*, NSEvent*> RightMouseClickInView(NSView* view,
                                                     NSUInteger clickCount);
 
+NSEvent* TestMouseEvent(NSPoint window_point,
+                        NSEventType type,
+                        NSWindow* window,
+                        NSUInteger modifiers,
+                        NSUInteger clickCount);
+
 // Creates a test scroll event. |has_precise_deltas| determines the value of
 // -[NSEvent hasPreciseScrollingDeltas] - usually NO for a mouse wheel and YES
 // for a trackpad. If |window| is nil, |location| is assumed to be AppKit screen
 // coordinates (origin in bottom left of primary screen).
 NSEvent* TestScrollEvent(NSPoint location,
                          NSWindow* window,
                          CGFloat delta_x,
                          CGFloat delta_y,
                          bool has_precise_deltas,
                          NSEventPhase event_phase,
@@ skipping 33 matching lines @@
 // Creates a key event in a particular window.
 NSEvent* SynthesizeKeyEvent(NSWindow* window,
                             bool keyDown,
                             ui::KeyboardCode keycode,
                             NSUInteger flags,
                             ui::DomKey dom_key = ui::DomKey::NONE);
 
 }  // namespace cocoa_test_event_utils
 
 #endif  // UI_EVENTS_TEST_COCOA_TEST_EVENT_UTILS_H_