Added automatic update for plugins based on watching file changes.

chrome/browser/plugin_service.h

Index: chrome/browser/plugin_service.h
diff --git a/chrome/browser/plugin_service.h b/chrome/browser/plugin_service.h
index e90f6a7fee3bd477a699487ec607da2737ad9897..5e03c09984ea86bcdaa40d00d008b6ff7fd1056c 100644
--- a/chrome/browser/plugin_service.h
+++ b/chrome/browser/plugin_service.h
@@ -14,6 +14,7 @@
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/hash_tables.h"
+#include "base/scoped_vector.h"
 #include "base/singleton.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "build/build_config.h"
@@ -28,6 +29,10 @@
 #include "base/win/registry.h"
 #endif
 
+#if defined(OS_LINUX)
+#include "chrome/browser/file_path_watcher/file_path_watcher.h"
+#endif
+
 #if defined(OS_CHROMEOS)
 namespace chromeos {
 class PluginSelectionPolicy;
@@ -40,6 +45,7 @@ class Message;
 
 class MessageLoop;
 class Profile;
+class PluginDirWatcherDelegate;
 class ResourceDispatcherHost;
 
 namespace net {
@@ -144,6 +150,14 @@ class PluginService
       const FilePath& plugin_path,
       PluginProcessHost::Client* client);
 
+#if defined(OS_LINUX)
+  // Registers a new FilePathWatcher for a given path.
+  static void RegisterFilePathWatcher(
+      FilePathWatcher* watcher,
+      const FilePath& path,
+      FilePathWatcher::Delegate* delegate);
+#endif
+
   // mapping between plugin path and PluginProcessHost
   typedef base::hash_map<FilePath, PluginProcessHost*> PluginMap;
   PluginMap plugin_hosts_;
@@ -181,6 +195,11 @@ class PluginService
   base::WaitableEventWatcher hklm_watcher_;
 #endif
 
+#if defined(OS_LINUX)
+  ScopedVector<FilePathWatcher> file_watchers_;
+  scoped_refptr<PluginDirWatcherDelegate> file_watcher_delegate_;
+#endif
+
   // Set to true if chrome plugins are enabled. Defaults to true.
   static bool enable_chrome_plugins_;