Move core MediaControls implementation to modules/media_controls/.

third_party/WebKit/Source/modules/BUILD.gn

Index: third_party/WebKit/Source/modules/BUILD.gn
diff --git a/third_party/WebKit/Source/modules/BUILD.gn b/third_party/WebKit/Source/modules/BUILD.gn
index 8431a8940d44cdb2bbc7874136e0d7436103ca2c..15fa267ed46b8499607013283b51a3b5a583cd6a 100644
--- a/third_party/WebKit/Source/modules/BUILD.gn
+++ b/third_party/WebKit/Source/modules/BUILD.gn
@@ -128,6 +128,7 @@ target(modules_target_type, "modules") {
     "//third_party/WebKit/Source/modules/installation",
     "//third_party/WebKit/Source/modules/installedapp",
     "//third_party/WebKit/Source/modules/media_capabilities",
+    "//third_party/WebKit/Source/modules/media_controls",
     "//third_party/WebKit/Source/modules/mediacapturefromelement",
     "//third_party/WebKit/Source/modules/mediarecorder",
     "//third_party/WebKit/Source/modules/mediasession",
@@ -271,6 +272,8 @@ source_set("unit_tests") {
     "indexeddb/IDBTransactionTest.cpp",
     "indexeddb/MockWebIDBDatabase.cpp",
     "indexeddb/MockWebIDBDatabase.h",
+    "media_controls/MediaControlsImplTest.cpp",
+    "media_controls/MediaControlsOrientationLockDelegateTest.cpp",
     "mediastream/MediaConstraintsTest.cpp",
     "notifications/NotificationDataTest.cpp",
     "notifications/NotificationImageLoaderTest.cpp",