Replace RTC_DCHECK(false) with RTC_NOTREACHED().

webrtc/modules/desktop_capture/screen_drawer_linux.cc

 /*
  *  Copyright (c) 2016 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 65 matching lines @@
 };
 
 ScreenDrawerLinux::ScreenDrawerLinux() {
   display_ = SharedXDisplay::CreateDefault();
   RTC_CHECK(display_.get());
   screen_num_ = DefaultScreen(display_->display());
   XWindowAttributes root_attributes;
   if (!XGetWindowAttributes(display_->display(),
                             RootWindow(display_->display(), screen_num_),
                             &root_attributes)) {
-    RTC_DCHECK(false) << "Failed to get root window size.";
+    RTC_NOTREACHED() << "Failed to get root window size.";
   }
   window_ = XCreateSimpleWindow(
       display_->display(), RootWindow(display_->display(), screen_num_), 0, 0,
       root_attributes.width, root_attributes.height, 0,
       BlackPixel(display_->display(), screen_num_),
       BlackPixel(display_->display(), screen_num_));
   XSelectInput(display_->display(), window_, StructureNotifyMask);
   XMapWindow(display_->display(), window_);
   while (true) {
     XEvent event;
     XNextEvent(display_->display(), &event);
     if (event.type == MapNotify) {
       break;
     }
   }
   XFlush(display_->display());
   Window child;
   int x, y;
   if (!XTranslateCoordinates(display_->display(), window_,
                              RootWindow(display_->display(), screen_num_), 0, 0,
                              &x, &y, &child)) {
-    RTC_DCHECK(false) << "Failed to get window position.";
+    RTC_NOTREACHED() << "Failed to get window position.";
   }
   // Some window manager does not allow a window to cover two or more monitors.
   // So if the window is on the first monitor of a two-monitor system, the
   // second half won't be able to show up without changing configurations of WM,
   // and its DrawableRegion() is not accurate.
   rect_ = DesktopRect::MakeLTRB(x, y, root_attributes.width,
                                 root_attributes.height);
   context_ = DefaultGC(display_->display(), screen_num_);
   colormap_ = DefaultColormap(display_->display(), screen_num_);
   BringToFront();
@@ skipping 73 matching lines @@
 
 // static
 std::unique_ptr<ScreenDrawer> ScreenDrawer::Create() {
   if (SharedXDisplay::CreateDefault().get()) {
     return std::unique_ptr<ScreenDrawer>(new ScreenDrawerLinux());
   }
   return nullptr;
 }
 
 }  // namespace webrtc