Implement Just-In-Time Flash updates.

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 7e559591b32551e4d4ae2d8d24524d13f9f0b30a..7dee1d06da89118376efa2dcca054835b7f97870 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -42,6 +42,7 @@ enum class ChromeViewHostMsg_GetPluginInfo_Status {
   kOutdatedBlocked,
   kOutdatedDisallowed,
   kPlayImportantContent,
+  kComponentUpdateRequired,
   kUnauthorized,
 };
 
@@ -411,6 +412,18 @@ IPC_MESSAGE_ROUTED1(ChromeViewMsg_ErrorDownloadingPlugin,
                     std::string /* message */)
 #endif  // defined(ENABLE_PLUGIN_INSTALLATION)
 
+// Notifies a missing plugin placeholder that we have finished component-
+// updating the plug-in.
+IPC_MESSAGE_ROUTED0(ChromeViewMsg_PluginComponentUpdateSuccess)
+
+// Notifies a missing plugin placeholder that we have failed to component-update
+// the plug-in.
+IPC_MESSAGE_ROUTED0(ChromeViewMsg_PluginComponentUpdateFailure)
+
+// Notifies a missing plugin placeholder that we have started the component
+// download.
+IPC_MESSAGE_ROUTED0(ChromeViewMsg_PluginComponentUpdateDownloading)
+
 // Notifies a missing plugin placeholder that the user cancelled downloading
 // the plugin.
 IPC_MESSAGE_ROUTED0(ChromeViewMsg_CancelledDownloadingPlugin)
@@ -450,6 +463,12 @@ IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_BlockedOutdatedPlugin,
                     int /* placeholder ID */,
                     std::string /* plugin group identifier */)
 
+// Notifies when a plugin couldn't be loaded because it requires a component
+// update.
+IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_BlockedUpdatePlugin,

[Bernhard Bauer, 2016/07/28 10:25:10]

Nit: the name of the message doesn't make much sense... maybe
_BlockedComponentUpdatedPlugin?

[waffles, 2016/07/28 20:06:27]

Done.

+                    int /* placeholder ID */,
+                    std::string /* plugin group identifier */)
+
 // Notifies when a plugin couldn't be loaded because it requires
 // user authorization.
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_BlockedUnauthorizedPlugin,