Implement Just-In-Time Flash updates.

chrome/browser/plugins/plugin_observer.h

Index: chrome/browser/plugins/plugin_observer.h
diff --git a/chrome/browser/plugins/plugin_observer.h b/chrome/browser/plugins/plugin_observer.h
index 172b06d04ab93393714d2f5b5e789dccba1b3d97..110f777ffff52dc5ccb61d0f8e246757be1a2a41 100644
--- a/chrome/browser/plugins/plugin_observer.h
+++ b/chrome/browser/plugins/plugin_observer.h
@@ -6,9 +6,11 @@
 #define CHROME_BROWSER_PLUGINS_PLUGIN_OBSERVER_H_
 
 #include <memory>
+#include <string>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "components/component_updater/component_updater_service.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
@@ -45,6 +47,7 @@ class PluginObserver : public content::WebContentsObserver,
                          content::RenderFrameHost* render_frame_host) override;
 
  private:
+  class ComponentObserver;
   explicit PluginObserver(content::WebContents* web_contents);
   friend class content::WebContentsUserData<PluginObserver>;
 
@@ -55,9 +58,12 @@ class PluginObserver : public content::WebContentsObserver,
                                    const std::string& identifier);
   void OnBlockedOutdatedPlugin(int placeholder_id,
                                const std::string& identifier);
+  void OnBlockedComponentUpdatedPlugin(int placeholder_id,
+                                       const std::string& identifier);
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   void OnRemovePluginPlaceholderHost(int placeholder_id);
 #endif
+  void RemoveComponentObserver(int placeholder_id);
   void OnOpenAboutPlugins();
   void OnCouldNotLoadPlugin(const base::FilePath& plugin_path);
 
@@ -66,6 +72,9 @@ class PluginObserver : public content::WebContentsObserver,
   std::map<int, PluginPlaceholderHost*> plugin_placeholders_;
 #endif
 
+  // Stores all ComponentObservers, keyed by their routing ID.
+  std::map<int, std::unique_ptr<ComponentObserver>> component_observers_;
+
   base::WeakPtrFactory<PluginObserver> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginObserver);