WebView Metrics client implementation (Chromium part)

android_webview/native/BUILD.gn

Index: android_webview/native/BUILD.gn
diff --git a/android_webview/native/BUILD.gn b/android_webview/native/BUILD.gn
index cec2c0ecbb9b1002f95052da6d9afa1a271374f1..c4dbb20ba188b8328a58a8c8cfb123554970358d 100644
--- a/android_webview/native/BUILD.gn
+++ b/android_webview/native/BUILD.gn
@@ -28,7 +28,10 @@ source_set("native") {
     "//ui/gfx/geometry:geometry",
   ]
 
-  include_dirs = [ "//skia/config" ]
+  include_dirs = [
+    "//skia/config",
+    "//third_party/protobuf",
+  ]
 
   sources = [
     "android_protocol_handler.cc",
@@ -65,6 +68,8 @@ source_set("native") {
     "aw_media_url_interceptor.h",
     "aw_message_port_service_impl.cc",
     "aw_message_port_service_impl.h",
+    "aw_metrics_switch.cc",
+    "aw_metrics_switch.h",
     "aw_pdf_exporter.cc",
     "aw_pdf_exporter.h",
     "aw_picture.cc",
@@ -128,6 +133,7 @@ generate_jni("native_jni") {
     "../java/src/org/chromium/android_webview/AwFormDatabase.java",
     "../java/src/org/chromium/android_webview/AwHttpAuthHandler.java",
     "../java/src/org/chromium/android_webview/AwMessagePortService.java",
+    "../java/src/org/chromium/android_webview/AwMetricsServiceClient.java",
     "../java/src/org/chromium/android_webview/AwPdfExporter.java",
     "../java/src/org/chromium/android_webview/AwPicture.java",
     "../java/src/org/chromium/android_webview/AwQuotaManagerBridge.java",