media: Remove Browser CDM implementation

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index 6e6a0f27ced9be3c8d4d09c5f1aa72e5800bc035..a9e6e1be053c01b28220cf6b3f4a3c9e0b101ac0 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -55,7 +55,6 @@ class ChannelMojoHost;
 namespace content {
 class AudioInputRendererHost;
 class AudioRendererHost;
-class BrowserCdmManager;
 class InProcessChildThreadParams;
 class MessagePortMessageFilter;
 class MojoChildConnection;
@@ -167,10 +166,6 @@ class CONTENT_EXPORT RenderProcessHostImpl
   std::unique_ptr<base::SharedPersistentMemoryAllocator> TakeMetricsAllocator()
       override;
   const base::TimeTicks& GetInitTimeForNavigationMetrics() const override;
-#if defined(ENABLE_BROWSER_CDMS)
-  scoped_refptr<media::MediaKeys> GetCdm(int render_frame_id,
-                                         int cdm_id) const override;
-#endif
   bool IsProcessBackgrounded() const override;
   void IncrementServiceWorkerRefCount() override;
   void DecrementServiceWorkerRefCount() override;