Implement Just-In-Time Flash updates.

components/component_updater/default_component_installer.h

Index: components/component_updater/default_component_installer.h
diff --git a/components/component_updater/default_component_installer.h b/components/component_updater/default_component_installer.h
index 8819c29053bf1b0390f0680600defd3ffda0958b..126aeefa5860719e82ba3d6a0ffeba3a1e59aa72 100644
--- a/components/component_updater/default_component_installer.h
+++ b/components/component_updater/default_component_installer.h
@@ -86,6 +86,9 @@ class ComponentInstallerTraits {
   // Returns the human-readable name of the component.
   virtual std::string GetName() const = 0;
 
+  // If this component is a plugin, returns the media types it can handle.
+  virtual std::vector<std::string> GetMimeTypes() const = 0;
+
   // Returns a container of name-value pairs representing arbitrary,
   // installer-defined metadata.
   // The installer metadata may be used in the update checks for this component.