Remove factory methods from ChromeApplication.

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index 27dad66c987819bfafad76c8d6373db6a362573c..124e34fb38315bcc072ec55bcf4fcc1e2ffcc378 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -35,6 +35,8 @@ chrome_sync_shell_jinja_variables =
     default_chrome_public_jinja_variables +
     [ "manifest_package=org.chromium.chrome.sync_shell" ]
 
+app_hooks_impl = "java/src/org/chromium/chrome/browser/AppHooksImpl.java"
+
 if (enable_resource_whitelist_generation) {
   monochrome_resource_whitelist =
       "$target_gen_dir/monochrome_resource_whitelist.txt"
@@ -150,6 +152,13 @@ java_strings_grd("chrome_strings_grd") {
   ]
 }
 
+android_library("app_hooks_java") {
+  java_files = [ app_hooks_impl ]
+  deps = [
+    ":chrome_java",
+  ]
+}
+
 android_library("chrome_java") {
   deps = [
     ":chrome_java_resources",
@@ -255,12 +264,16 @@ android_library("chrome_java") {
   android_manifest = chrome_public_android_manifest
 
   # From java_sources.gni.
-  java_files = chrome_java_sources
+  java_files = chrome_java_sources + [ app_hooks_impl ]
 
   if (enable_webvr) {
     java_files += chrome_vr_java_sources
     deps += [ "//third_party/gvr-android-sdk:gvr_common_java" ]
   }
+
+  # Add the actual implementation where necessary so that downstream targets
+  # can provide their own implementations.
+  jar_excluded_patterns = [ "*/AppHooksImpl.class" ]
 }
 
 action("chrome_android_java_google_api_keys_srcjar") {
@@ -312,6 +325,7 @@ junit_binary("chrome_junit_tests") {
   # From java_sources.gni.
   java_files = chrome_junit_test_java_sources
   deps = [
+    ":app_hooks_java",
     ":chrome_java",
     ":chrome_java_resources",
     "//base:base_java",
@@ -382,6 +396,7 @@ android_library("chrome_test_java") {
   deps = [
     "//base:base_java",
     "//base:base_java_test_support",
+    "//chrome/android:app_hooks_java",
     "//chrome/android:chrome_java",
     "//chrome/android/webapk/libs/client:client_java",
     "//chrome/android/webapk/libs/common:common_java",
@@ -476,6 +491,7 @@ android_library("chrome_test_vr_java") {
   deps = [
     "//base:base_java",
     "//base:base_java_test_support",
+    "//chrome/android:app_hooks_java",
     "//chrome/android:chrome_java",
     "//chrome/test/android:chrome_java_test_support",
     "//components/policy/android:policy_java",
@@ -692,6 +708,7 @@ template("chrome_public_apk_tmpl_shared") {
     }
 
     deps += [
+      ":app_hooks_java",
       ":chrome_java",
       ":chrome_public_apk_resources",
       ":chrome_public_non_pak_assets",
@@ -725,6 +742,7 @@ monochrome_public_apk_tmpl("monochrome_public_apk") {
 
   deps = [
     "//base:base_java",
+    "//chrome/android:app_hooks_java",
     "//chrome/android:chrome_java",
     "//chrome/android/java/templates:public_monochrome_java",
   ]
@@ -816,6 +834,7 @@ android_library("chrome_sync_shell_test_apk_java") {
   deps = [
     "//base:base_java",
     "//base:base_java_test_support",
+    "//chrome/android:app_hooks_java",
     "//chrome/android:chrome_java",
     "//chrome/test/android:chrome_java_test_support",
     "//components/bookmarks/common/android:bookmarks_java",