Report built_in_version to Omaha for Flash updates.

chrome/browser/component_updater/pepper_flash_component_installer.cc

Index: chrome/browser/component_updater/pepper_flash_component_installer.cc
diff --git a/chrome/browser/component_updater/pepper_flash_component_installer.cc b/chrome/browser/component_updater/pepper_flash_component_installer.cc
index 29dad7c8cb9d0d7d9f2b5fe40da9b5f45c618499..6c8f3466992ae1c6aaae7842568cdbe1f6007933 100644
--- a/chrome/browser/component_updater/pepper_flash_component_installer.cc
+++ b/chrome/browser/component_updater/pepper_flash_component_installer.cc
@@ -340,7 +340,16 @@ std::string FlashComponentInstallerTraits::GetName() const {
 
 update_client::InstallerAttributes
 FlashComponentInstallerTraits::GetInstallerAttributes() const {
-  return update_client::InstallerAttributes();
+  // For Chrome OS, send the built-in flash player version to the server,
+  // otherwise it will serve component updates of outdated flash players.
+  update_client::InstallerAttributes attrs;
+#if defined(OS_CHROMEOS)
+  const std::string flash_version =
+      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+          switches::kPpapiFlashVersion);
+  attrs["built_in_version"] = flash_version;
+#endif  // #defined(OS_CHROMEOS)
+  return attrs;
 }
 
 std::vector<std::string> FlashComponentInstallerTraits::GetMimeTypes() const {