Hold cros_component_installers in browser_process.

chrome/browser/browser_process.h

Index: chrome/browser/browser_process.h
diff --git a/chrome/browser/browser_process.h b/chrome/browser/browser_process.h
index cf07d9a0d1bce449bc8acc27b0083bdf4294c422..17f6b4e4f8d7505d7abfc944a7ec1d5e325e4b99 100644
--- a/chrome/browser/browser_process.h
+++ b/chrome/browser/browser_process.h
@@ -54,7 +54,9 @@ class VariationsService;
 }
 
 namespace component_updater {
+class ComponentInstallerTraits;
 class ComponentUpdateService;
+class DefaultComponentInstaller;
 class PnaclComponentInstaller;
 class SupervisedUserWhitelistInstaller;
 }
@@ -289,6 +291,14 @@ class BrowserProcess {
   // Returns the Physical Web data source.
   virtual physical_web::PhysicalWebDataSource* GetPhysicalWebDataSource() = 0;
 
+#if defined(OS_CHROMEOS)

[sky, 2017/05/23 20:22:23]

Can this be moved to browser_process_platform_part_chromeos?

[xiaochu, 2017/05/23 21:31:59]

Done.

+  virtual component_updater::DefaultComponentInstaller*
+  cros_component_installer(

[sky, 2017/05/23 20:22:23]

Please name this GetCrosComponentInstaller().

[xiaochu, 2017/05/23 21:31:59]

Done.

+      const std::string& name,
+      std::unique_ptr<component_updater::ComponentInstallerTraits>
+          installer_traits) = 0;
+#endif
+
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };