Hold cros_component_installers in browser_process.

chrome/browser/browser_process_platform_part_chromeos.h

Index: chrome/browser/browser_process_platform_part_chromeos.h
diff --git a/chrome/browser/browser_process_platform_part_chromeos.h b/chrome/browser/browser_process_platform_part_chromeos.h
index 675e57c95c91677755acb36c1c5612fd9efd2f63..e0c970e1ca2fe60110dc3cf83f0382c9774d886f 100644
--- a/chrome/browser/browser_process_platform_part_chromeos.h
+++ b/chrome/browser/browser_process_platform_part_chromeos.h
@@ -6,8 +6,10 @@
 #define CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_
 
 #include <memory>
+#include <string>
 
 #include "base/compiler_specific.h"
+#include "base/containers/flat_set.h"
 #include "base/macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "chrome/browser/browser_process_platform_part_base.h"
@@ -98,6 +100,10 @@ class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
   chromeos::system::SystemClock* GetSystemClock();
   void DestroySystemClock();
 
+  void AddCompatibleCrOSComponent(const std::string& name);
+
+  bool IsCompatibleCrOSComponent(const std::string& name);
+
  private:
   void CreateProfileHelper();
 
@@ -124,6 +130,8 @@ class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
 
   std::unique_ptr<ScopedKeepAlive> keep_alive_;
 
+  base::flat_set<std::string> compatible_cros_components_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessPlatformPart);
 };