Reland of Refactor webrtc/modules/desktop_capture for GN check

Reason for revert:
Trying to reland this CL.

Original issue's description:
> Revert of Refactor webrtc/modules/desktop_capture for GN check (patchset #1 id:1 of https://codereview.webrtc.org/2593713002/ )
>
> Reason for revert:
> Apparently breaks Chromium compile for unknown reason:
> https://build.chromium.org/p/chromium.webrtc.fyi/builders/Linux%20Builder/builds/12314
>
> Original issue's description:
> > Refactor webrtc/modules/desktop_capture for GN check
> >
> > This moves some GN check configurations out of .gn to individual
> > targets.
> >
> > The now checked target is:
> > "//webrtc/modules/desktop_capture/*"
> >
> > BUG=webrtc:6828
> > NOTRY=True
> >
> > Review-Url: https://codereview.webrtc.org/2593713002
> > Cr-Commit-Position: refs/heads/master@{#15725}
> > Committed: 70870b9211
>
> TBR=sergeyu@chromium.org,mbonadei@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:6828
>
> Review-Url: https://codereview.webrtc.org/2597923002
> Cr-Commit-Position: refs/heads/master@{#15750}
> Committed: d943c48454

TBR=sergeyu@chromium.org,kjellander@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6828

Review-Url: https://codereview.webrtc.org/2609523002
Cr-Commit-Position: refs/heads/master@{#15832}

.gn

@@ -31,6 +31,7 @@ check_targets = [
   "//webrtc/modules/audio_processing/*",
   "//webrtc/modules/bitrate_controller/*",
   "//webrtc/modules/congestion_controller/*",
+  "//webrtc/modules/desktop_capture/*",
   "//webrtc/modules/media_file/*",
   "//webrtc/modules/pacing/*",
   "//webrtc/modules/rtp_rtcp/*",

webrtc/modules/desktop_capture/BUILD.gn

@@ -22,9 +22,12 @@ rtc_static_library("primitives") {
     "desktop_region.h",
     "shared_desktop_frame.cc",
     "shared_desktop_frame.h",
+    "shared_memory.cc",
+    "shared_memory.h",
   ]
 
   deps = [
+    "../..:webrtc_common",
     "../../base:rtc_base",  # TODO(kjellander): Cleanup in bugs.webrtc.org/3806.
   ]
 }
@@ -41,6 +44,11 @@ if (rtc_include_tests) {
       "rgba_color.cc",
       "rgba_color.h",
     ]
+
+    deps = [
+      ":primitives",
+      "../..:webrtc_common",
+    ]
   }
 
   source_set("screen_drawer") {
@@ -57,6 +65,12 @@ if (rtc_include_tests) {
       "screen_drawer_mac.cc",
       "screen_drawer_win.cc",
     ]
+
+    deps = [
+      ":primitives",
+      "../../base:rtc_base_approved",
+      "../../system_wrappers",
+    ]
   }
 
   source_set("desktop_capture_mock") {
@@ -75,7 +89,12 @@ if (rtc_include_tests) {
       "fake_desktop_capturer.h",
       "mock_desktop_capturer_callback.cc",
       "mock_desktop_capturer_callback.h",
-      "screen_capturer_mock_objects.h",
+    ]
+
+    deps = [
+      ":primitives",
+      "../../base:rtc_base_approved",
+      "../../test:test_support",
     ]
   }
 }
@@ -121,8 +140,6 @@ rtc_static_library("desktop_capture") {
     "screen_capturer_helper.h",
     "screen_capturer_mac.mm",
     "screen_capturer_win.cc",
-    "shared_memory.cc",
-    "shared_memory.h",
     "win/cursor.cc",
     "win/cursor.h",
     "win/d3d_device.cc",
@@ -198,6 +215,7 @@ rtc_static_library("desktop_capture") {
 
   deps = [
     ":primitives",
+    "../..:webrtc_common",
     "../../base:rtc_base",  # TODO(kjellander): Cleanup in bugs.webrtc.org/3806.
     "../../system_wrappers",
     "//third_party/libyuv",

webrtc/modules/desktop_capture/desktop_capture_types.h

@@ -13,7 +13,6 @@
 
 #include <stdint.h>
 
-#include "webrtc/modules/desktop_capture/desktop_geometry.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
@@ -40,4 +39,3 @@ const ScreenId kInvalidScreenId = -2;
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURE_TYPES_H_
-

webrtc/modules/desktop_capture/shared_desktop_frame.cc

@@ -13,7 +13,6 @@
 #include <memory>
 
 #include "webrtc/base/constructormagic.h"
-#include "webrtc/system_wrappers/include/atomic32.h"
 
 namespace webrtc {