MacViews: Implement capture using NSEvent local+global monitors

ui/events/cocoa/events_mac.mm

 // 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.
 
 #include "ui/events/event_utils.h"
 
 #include <Cocoa/Cocoa.h>
 
 #import "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "ui/events/cocoa/cocoa_event_utils.h"
 #include "ui/events/event_utils.h"
 #import "ui/events/keycodes/keyboard_code_conversion_mac.h"
+#import "ui/gfx/mac/coordinate_conversion.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/vector2d.h"
 
 namespace ui {
 
 void UpdateDeviceList() {
   NOTIMPLEMENTED();
 }
 
 EventType EventTypeFromNative(const base::NativeEvent& native_event) {
@@ skipping 57 matching lines @@
   // Truncate to extract seconds before doing floating point arithmetic.
   int64_t seconds = since_system_startup;
   since_system_startup -= seconds;
   int64_t microseconds = since_system_startup * 1000000;
   return base::TimeDelta::FromSeconds(seconds) +
       base::TimeDelta::FromMicroseconds(microseconds);
 }
 
 gfx::Point EventLocationFromNative(const base::NativeEvent& native_event) {
   NSWindow* window = [native_event window];
-  if (!window) {
-    NOTIMPLEMENTED();  // Point will be in screen coordinates.
-    return gfx::Point();
-  }
   NSPoint location = [native_event locationInWindow];
+  // When the window is nil, locationInWindow gives screen coordinates.
+  if (!window)
+    return gfx::ScreenPointFromNSPoint(location);
+
   NSRect content_rect = [window contentRectForFrameRect:[window frame]];
   return gfx::Point(location.x, NSHeight(content_rect) - location.y);
 }
 
 gfx::Point EventSystemLocationFromNative(
     const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return gfx::Point();
 }
 
@@ skipping 156 matching lines @@
   uint16 return_value;
   [text getCharacters:&return_value];
   return return_value;
 }
 
 bool IsCharFromNative(const base::NativeEvent& native_event) {
   return false;
 }
 
 }  // namespace ui