Remove Safebrowsing Rappor support

components/rappor/BUILD.gn

Index: components/rappor/BUILD.gn
diff --git a/components/rappor/BUILD.gn b/components/rappor/BUILD.gn
index 66b87449b248d65e01e38e10805ca630c563b78f..763a05a14c2a700f068d36268a91e985ba6e7fe2 100644
--- a/components/rappor/BUILD.gn
+++ b/components/rappor/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//testing/test.gni")
+
 static_library("rappor") {
   sources = [
     "bloom_filter.cc",
@@ -106,3 +108,14 @@ source_set("unit_tests") {
     "//url",
   ]
 }
+
+# Convenience testing target
+test("rappor_unittests") {
+  sources = [
+    "//components/test/run_all_unittests.cc",
+  ]
+  deps = [
+    ":unit_tests",
+    "//components/test:test_support",
+  ]
+}