Decompose //extensions/browser/BUILD.gn

extensions/browser/api/sockets_tcp/BUILD.gn

Index: extensions/browser/api/sockets_tcp/BUILD.gn
diff --git a/third_party/WebKit/Source/core/imagebitmap/BUILD.gn b/extensions/browser/api/sockets_tcp/BUILD.gn
similarity index 61%
copy from third_party/WebKit/Source/core/imagebitmap/BUILD.gn
copy to extensions/browser/api/sockets_tcp/BUILD.gn
index 57a855ca9470acb07aba6a48b7f554ada7e66d52..ac0a3d35dc63555e89a344b928c749bae9f0f2aa 100644
--- a/third_party/WebKit/Source/core/imagebitmap/BUILD.gn
+++ b/extensions/browser/api/sockets_tcp/BUILD.gn
@@ -2,18 +2,20 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//third_party/WebKit/Source/core/core.gni")
-
-blink_core_sources("imagebitmap") {
+source_set("sockets_tcp") {
   sources = [
-    "ImageBitmapFactories.cpp",
-    "ImageBitmapFactories.h",
-    "ImageBitmapSource.cpp",
-    "ImageBitmapSource.h",
+    "sockets_tcp_api.cc",
+    "sockets_tcp_api.h",
+    "tcp_socket_event_dispatcher.cc",
+    "tcp_socket_event_dispatcher.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
+
+  deps = [
+    "//extensions/common/api",
+  ]
 }