Add more components to "gn check"

components/page_load_metrics/browser/BUILD.gn

Index: components/page_load_metrics/browser/BUILD.gn
diff --git a/components/page_load_metrics/browser/BUILD.gn b/components/page_load_metrics/browser/BUILD.gn
index da7ad515c0b6a48805c73e6500786d3d3198edce..d680c5f0ddc4084a2f047f0d66261269f068f158 100644
--- a/components/page_load_metrics/browser/BUILD.gn
+++ b/components/page_load_metrics/browser/BUILD.gn
@@ -18,7 +18,9 @@ static_library("browser") {
   deps = [
     "//base",
     "//components/page_load_metrics/common",
+    "//components/rappor",
     "//ipc",
+    "//net",
   ]
 }
 
@@ -29,6 +31,12 @@ source_set("unit_tests") {
   ]
   deps = [
     ":browser",
+    "//base",
+    "//base/test:test_support",
+    "//components/page_load_metrics/common",
+    "//components/rappor:test_support",
+    "//content/test:test_support",
+    "//net",
     "//testing/gtest",
   ]
 }