Introduce the ENABLE_BROWSER_CDMS macro.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 2b4fbe0310866e4281422e2b587ac4072fe2104a..3fb83ac2a24dde688b1eef2ebcc8dcdf3f26c0b4 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -62,6 +62,8 @@ class GeolocationDispatcher;
 class MediaStreamRendererFactory;
 class NotificationProvider;
 class PepperPluginInstanceImpl;
+class RendererCdmManager;
+class RendererMediaPlayerManager;
 class RendererPpapiHost;
 class RenderFrameObserver;
 class RenderViewImpl;
@@ -69,11 +71,6 @@ class RenderWidget;
 class RenderWidgetFullscreenPepper;
 struct CustomContextMenuContext;
 
-#if defined(OS_ANDROID)
-class RendererCdmManager;
-class RendererMediaPlayerManager;
-#endif
-
 class CONTENT_EXPORT RenderFrameImpl
     : public RenderFrame,
       NON_EXPORTED_BASE(public blink::WebFrameClient),
@@ -542,6 +539,9 @@ class CONTENT_EXPORT RenderFrameImpl
       blink::WebMediaPlayerClient* client);
 
   RendererMediaPlayerManager* GetMediaPlayerManager();
+#endif
+
+#if defined(ENABLE_BROWSER_CDMS)
   RendererCdmManager* GetCdmManager();
 #endif
 
@@ -611,10 +611,16 @@ class CONTENT_EXPORT RenderFrameImpl
   blink::WebUserMediaClient* web_user_media_client_;
 
 #if defined(OS_ANDROID)
-  // These manage all media players and CDMs in this render frame for
-  // communicating with the real media player and CDM objects in the browser
-  // process. It's okay to use raw pointers since they are RenderFrameObservers.
+  // Manages all media players in this render frame for communicating with the
+  // real media player in the browser process. It's okay to use a raw pointer
+  // since it's a RenderFrameObserver.
   RendererMediaPlayerManager* media_player_manager_;
+#endif
+
+#if defined(ENABLE_BROWSER_CDMS)
+  // Manage all CDMs in this render frame for communicating with the real CDM in
+  // the browser process. It's okay to use a raw pointer since it's a
+  // RenderFrameObserver.
   RendererCdmManager* cdm_manager_;
 #endif