[Chromoting] Improve DirectX capturer to support multiple outputs

webrtc/modules/desktop_capture/desktop_geometry.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 106 matching lines @@
 
   // Returns true if |point| lies within the rectangle boundaries.
   bool Contains(const DesktopVector& point) const;
 
   // Returns true if |rect| lies within the boundaries of this rectangle.
   bool ContainsRect(const DesktopRect& rect) const;
 
   // Finds intersection with |rect|.
   void IntersectWith(const DesktopRect& rect);
 
+  // Finds union with |rect|.

[Sergey Ulanov, 2016/07/08 22:36:53]

This actually returns a rect that covers both rectangles. It shouldn't be called
it "union". I think it is useful only rarely, so I don't think we want it as a
method of DesktopRect. Most code that needs to combine rects should be using
DesktopRegion

[Hzj_jie, 2016/07/11 00:54:59]

Done.

+  void JoinWith(const DesktopRect& rect);
+
   // Adds (dx, dy) to the position of the rectangle.
   void Translate(int32_t dx, int32_t dy);
   void Translate(DesktopVector d) { Translate(d.x(), d.y()); };
 
  private:
   DesktopRect(int32_t left, int32_t top, int32_t right, int32_t bottom)
       : left_(left), top_(top), right_(right), bottom_(bottom) {
   }
 
   int32_t left_;
   int32_t top_;
   int32_t right_;
   int32_t bottom_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_GEOMETRY_H_