Implement screen capture for android

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index f5e797b61fe5ea05cc3abeccf93be9587a92859d..6c537fe15d45a8d2d5c2d8d6e055c5af9b9811f8 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -680,12 +680,21 @@
             'base/browser_cdm_factory.h',
           ],
         }],
+        ['enable_webrtc==1 and OS=="android"', {
+          'sources': [
+            'screen_capture/android/screen_capturer2_android.cc',
+            'screen_capture/android/screen_capturer2_android.h',
+            'screen_capture/android/screen_capture_factory_android.cc',
+            'screen_capture/android/screen_capture_factory_android.h',
+          ],
+        }],
         ['OS=="android"', {
           'dependencies': [
             'media_android_jni_headers',
             'media_java',
             'player_android',
             'video_capture_android_jni_headers',
+            'screen_capture_android_jni_headers',
           ],
           'sources': [
             'base/media.cc',
@@ -1716,6 +1725,19 @@
           'includes': ['../build/jni_generator.gypi'],
         },
         {
+          # GN: //media/base/android:screen_capture_android_jni_headers
+          'target_name': 'screen_capture_android_jni_headers',
+          'type': 'none',
+          'sources': [
+            'base/android/java/src/org/chromium/media/ScreenCapture.java',
+            'base/android/java/src/org/chromium/media/ScreenCaptureFactory.java',
+          ],
+          'variables': {
+            'jni_gen_package': 'media',
+          },
+          'includes': ['../build/jni_generator.gypi'],
+        },
+        {
           # GN: //media/base/android:android
           'target_name': 'player_android',
           'type': 'static_library',