Hold cros_component_installers in browser_process.

chrome/browser/browser_process_platform_part_chromeos.cc

Index: chrome/browser/browser_process_platform_part_chromeos.cc
diff --git a/chrome/browser/browser_process_platform_part_chromeos.cc b/chrome/browser/browser_process_platform_part_chromeos.cc
index 4b63b33c1daa1e26f6c42546c58b4710352232d9..e4f670c95145e5103970f071585b457a3a021ef8 100644
--- a/chrome/browser/browser_process_platform_part_chromeos.cc
+++ b/chrome/browser/browser_process_platform_part_chromeos.cc
@@ -159,3 +159,17 @@ void BrowserProcessPlatformPart::CreateProfileHelper() {
   created_profile_helper_ = true;
   profile_helper_.reset(new chromeos::ProfileHelper());
 }
+
+scoped_refptr<component_updater::DefaultComponentInstaller>

[sky, 2017/05/23 23:20:29]

Style guide says position definition and declaration position should match (in
other words, move this above CreateProfileHelper).

[xiaochu, 2017/05/23 23:40:52]

Done.

+BrowserProcessPlatformPart::GetCrosComponentInstaller(
+    const std::string& name,
+    std::unique_ptr<component_updater::ComponentInstallerTraits>
+        installer_traits) {
+  auto it = cros_component_installers_.find(name);
+  if (it == cros_component_installers_.end()) {
+    cros_component_installers_[name] =
+        new component_updater::DefaultComponentInstaller(
+            std::move(installer_traits));
+  }
+  return cros_component_installers_[name];
+}