media: Remove Browser CDM implementation

content/public/test/mock_render_process_host.cc

Index: content/public/test/mock_render_process_host.cc
diff --git a/content/public/test/mock_render_process_host.cc b/content/public/test/mock_render_process_host.cc
index 6d20cc65a6f08ea4a5aaabc1da47ae90ebaabc86..b068e091144239c80702b2eae1749d601a34bc79 100644
--- a/content/public/test/mock_render_process_host.cc
+++ b/content/public/test/mock_render_process_host.cc
@@ -29,10 +29,6 @@
 #include "content/public/browser/render_widget_host_iterator.h"
 #include "content/public/browser/storage_partition.h"
 
-#if defined(ENABLE_BROWSER_CDMS)
-#include "media/base/media_keys.h"
-#endif
-
 namespace content {
 
 MockRenderProcessHost::MockRenderProcessHost(BrowserContext* browser_context)
@@ -274,14 +270,6 @@ const base::TimeTicks& MockRenderProcessHost::GetInitTimeForNavigationMetrics()
   return dummy_time;
 }
 
-#if defined(ENABLE_BROWSER_CDMS)
-scoped_refptr<media::MediaKeys> MockRenderProcessHost::GetCdm(
-    int render_frame_id,
-    int cdm_id) const {
-  return nullptr;
-}
-#endif
-
 bool MockRenderProcessHost::IsProcessBackgrounded() const {
   return is_process_backgrounded_;
 }