media: Remove Browser CDM implementation

content/public/test/mock_render_process_host.h

Index: content/public/test/mock_render_process_host.h
diff --git a/content/public/test/mock_render_process_host.h b/content/public/test/mock_render_process_host.h
index 3e50c5f47cb8d7320f753de15109fd377e50ef32..2591212881ab390385cf96bb65b8d79c0ea0dc46 100644
--- a/content/public/test/mock_render_process_host.h
+++ b/content/public/test/mock_render_process_host.h
@@ -97,10 +97,6 @@ class MockRenderProcessHost : public RenderProcessHost {
   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;