Tied up BlimpNavigationController to NavigationFeature

blimp/client/core/contents/BUILD.gn

Index: blimp/client/core/contents/BUILD.gn
diff --git a/blimp/client/core/contents/BUILD.gn b/blimp/client/core/contents/BUILD.gn
index 33a5b40286d99a624cea7cbccb04ca832d5b4e2c..9bd31bca69c657aeb0b2a927f7786b00d2c64125 100644
--- a/blimp/client/core/contents/BUILD.gn
+++ b/blimp/client/core/contents/BUILD.gn
@@ -16,11 +16,14 @@ source_set("contents") {
     "blimp_navigation_controller_delegate.h",
     "blimp_navigation_controller_impl.cc",
     "blimp_navigation_controller_impl.h",
+    "navigation_feature.cc",
+    "navigation_feature.h",
   ]
 
   public_deps = [
     "//base",
     "//blimp/client/public:public_headers",
+    "//blimp/common/proto",
     "//url",
   ]
 
@@ -44,6 +47,26 @@ source_set("contents") {
   }
 }
 
+source_set("test_support") {
+  testonly = true
+
+  sources = [
+    "fake_navigation_feature.cc",
+    "fake_navigation_feature.h",
+    "mock_navigation_feature_delegate.cc",
+    "mock_navigation_feature_delegate.h",
+  ]
+
+  deps = [
+    "//skia",
+    "//url",
+  ]
+
+  public_deps = [
+    "//testing/gmock",
+  ]
+}
+
 source_set("unit_tests") {
   visibility = [ "//blimp/client/core:unit_tests" ]
 
@@ -52,10 +75,12 @@ source_set("unit_tests") {
   sources = [
     "blimp_contents_impl_unittest.cc",
     "blimp_navigation_controller_impl_unittest.cc",
+    "navigation_feature_unittest.cc",
   ]
 
   deps = [
     ":contents",
+    ":test_support",
     "//base",
     "//blimp/client/public:public_headers",
     "//testing/gtest",