Port ChromeSyncShell build rules to GN

sync/BUILD.gn

Index: sync/BUILD.gn
diff --git a/sync/BUILD.gn b/sync/BUILD.gn
index 9f064b5e5862890a10154a965e8a59670a574c74..34b1c53a4ca3359095426f6e98b6afc17b3ec9b7 100644
--- a/sync/BUILD.gn
+++ b/sync/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
+import("//sync/protocol/protocol_sources.gni")
 import("//testing/test.gni")
 
 component("sync") {
@@ -434,10 +435,10 @@ source_set("sync_core") {
     "//google_apis",
     "//net",
     "//sql",
+    "//sync/protocol",
     "//third_party/leveldatabase",
     "//third_party/zlib",
     "//url",
-    "//sync/protocol",
   ]
 
   if (is_android) {
@@ -529,9 +530,9 @@ static_library("test_support_sync_core") {
 
   public_deps = [
     "//base",
+    "//sync",
     "//testing/gmock",
     "//testing/gtest",
-    "//sync",
   ]
 
   defines = [ "SYNC_TEST" ]
@@ -559,10 +560,10 @@ static_library("test_support_sync_internal_api") {
   ]
 
   public_deps = [
+    ":test_support_sync_core",
     "//base",
-    "//testing/gtest",
     "//sync",
-    ":test_support_sync_core",
+    "//testing/gtest",
   ]
 
   defines = [ "SYNC_TEST" ]
@@ -772,8 +773,8 @@ static_library("test_support_sync_fake_server") {
   deps = [
     "//base",
     "//net",
-    "//testing/gtest",
     "//sync",
+    "//testing/gtest",
     "//url",
   ]
 
@@ -836,14 +837,38 @@ if (is_android) {
     ]
   }
 
+  _test_support_sync_prepared_protos_dir =
+      "$root_gen_dir/test_support_sync_proto_java_prepare/"
+  action("test_support_sync_proto_java_prepare") {
+    script = "//sync/protocol/prepare_protos_for_java_tests.py"
+    inputs = sync_protocol_sources
+    outputs = process_file_template(
+            sync_protocol_sources,
+            [ "$_test_support_sync_prepared_protos_dir/{{source_file_part}}" ])
+    args = [
+      "--output_dir",
+      rebase_path(_test_support_sync_prepared_protos_dir, root_build_dir),
+    ]
+    args += rebase_path(sync_protocol_sources, root_build_dir)
+  }
+
+  # GYP: //sync/sync_tests.gypi:test_support_sync_proto_java
+  proto_java_library("test_support_sync_proto_java") {
+    proto_path = _test_support_sync_prepared_protos_dir
+    sources = get_target_outputs(":test_support_sync_proto_java_prepare")
+    deps = [
+      ":test_support_sync_proto_java_prepare",
+    ]
+  }
+
   # GYP: //sync/sync_tests.gypi:sync_java_test_support
   android_library("sync_java_test_support") {
     testonly = true
     deps = [
-      "android:sync_java",
       "//base:base_java",
       "//base:base_java_test_support",
       "//third_party/jsr-305:jsr_305_javalib",
+      "android:sync_java",
     ]
     DEPRECATED_java_in_dir = "test/android/javatests/src"
   }