Reland "components: Fix 'gn check' errors for omnibox."

This reverts commit cc83d2d.

Tested on Linux with the following command lines:

$ gn gen out-gn/Release --args='is_debug=false is_component_build=false symbol_level=1'
$ gn check out-gn/Release //components/omnibox/*

BUG=367595, 376000
TEST=see above
R=brettw@chromium.org

Review URL: https://codereview.chromium.org/1242973003

Cr-Commit-Position: refs/heads/master@{#339700}

.gn

@@ -36,6 +36,8 @@ check_targets = [
   "//components/app_modal/*",
   "//components/autofill/*",
   "//components/bookmarks/*",
+  "//components/google/*",
+  "//components/omnibox/*",
   "//components/os_crypt/*",
   "//components/pref_registry/*",
   "//components/undo/*",

components/BUILD.gn

@@ -300,8 +300,8 @@ test("components_unittests") {
     "//components/undo:unit_tests",
     "//components/update_client:unit_tests",
     "//components/variations:unit_tests",
-    "//components/web_resource:unit_tests",
     "//components/webcrypto:unit_tests",
+    "//components/web_resource:unit_tests",
     "//components/webdata/common:unit_tests",
 
     # These are the deps required by the code in this target.

components/omnibox/browser/BUILD.gn

@@ -84,13 +84,15 @@ source_set("browser") {
     ":in_memory_url_index_cache_proto",
     "//base",
     "//base:i18n",
+    "//base:prefs",
     "//components/bookmarks/browser",
     "//components/keyed_service/core",
     "//components/pref_registry",
     "//components/query_parser",
     "//components/resources",
     "//components/search",
     "//components/search_engines",
+    "//components/sessions",
     "//components/strings",
     "//components/url_fixer",
     "//components/variations",
@@ -122,6 +124,8 @@ static_library("test_support") {
     ":browser",
     "//base",
     "//components/metrics/proto",
+    "//components/search_engines",
+    "//net",
     "//testing/gmock",
   ]
 }
@@ -144,7 +148,12 @@ source_set("unit_tests") {
   deps = [
     ":browser",
     ":test_support",
+    "//base",
+    "//components/search",
+    "//components/search_engines",
+    "//components/variations",
     "//testing/gmock",
     "//testing/gtest",
+    "//url",
   ]
 }

components/sessions/BUILD.gn

@@ -22,6 +22,10 @@ if (!is_ios) {
 
     configs += [ ":implementation" ]
 
+    public_deps = [
+      ":shared",
+    ]
+
     deps = [
       ":shared",
       "//base",
@@ -40,6 +44,10 @@ if (!is_ios) {
       "ios/ios_serialized_navigation_driver.h",
     ]
 
+    public_deps = [
+      ":shared",
+    ]
+
     deps = [
       ":shared",
       "//base",