Add CdmService to keep track of CDMs

content/public/common/content_client.h

Index: content/public/common/content_client.h
diff --git a/content/public/common/content_client.h b/content/public/common/content_client.h
index eabd3da3396e9d562df5bd5a78322e14f0e7a1bb..58fe76352eb2b77034d134576f4f61e222ad743b 100644
--- a/content/public/common/content_client.h
+++ b/content/public/common/content_client.h
@@ -46,6 +46,7 @@ class ContentGpuClient;
 class ContentPluginClient;
 class ContentRendererClient;
 class ContentUtilityClient;
+struct ContentDecryptionModuleRegistration;
 struct PepperPluginInfo;
 
 // Setter and getter for the client.  The client should be set early, before any
@@ -88,6 +89,11 @@ class CONTENT_EXPORT ContentClient {
   virtual void AddPepperPlugins(
       std::vector<content::PepperPluginInfo>* plugins) {}
 
+  // Gives the embedder a chance to register the content decryption
+  // module(s) it supports.
+  virtual void AddContentDecryptionModules(
+      std::vector<content::ContentDecryptionModuleRegistration>* modules) {}
+
   // Gives the embedder a chance to register its own standard, referrer and
   // saveable url schemes early on in the startup sequence.
   virtual void AddAdditionalSchemes(