Migrate MediaStream test code from content/shell/renderer/ to content/test/.

content/shell/renderer/shell_content_renderer_client.cc

Index: content/shell/renderer/shell_content_renderer_client.cc
diff --git a/content/shell/renderer/shell_content_renderer_client.cc b/content/shell/renderer/shell_content_renderer_client.cc
index 650e7c50cd8e486f5c38d17f3a9d2e9e21773e11..68dccc99b926646175f32e7fc8108877060332da 100644
--- a/content/shell/renderer/shell_content_renderer_client.cc
+++ b/content/shell/renderer/shell_content_renderer_client.cc
@@ -12,7 +12,6 @@
 #include "content/public/renderer/render_view.h"
 #include "content/public/test/layouttest_support.h"
 #include "content/shell/common/shell_switches.h"
-#include "content/shell/renderer/shell_media_stream_client.h"
 #include "content/shell/renderer/shell_render_process_observer.h"
 #include "content/shell/renderer/shell_render_view_observer.h"
 #include "content/shell/renderer/webkit_test_runner.h"
@@ -146,13 +145,6 @@ ShellContentRendererClient::OverrideCreateWebRTCPeerConnectionHandler(
 #endif
 }
 
-webkit_media::MediaStreamClient*
-ShellContentRendererClient::OverrideCreateMediaStreamClient() {
-  if (!shell_media_stream_client_)
-    shell_media_stream_client_.reset(new ShellMediaStreamClient());
-  return shell_media_stream_client_.get();
-}
-
 WebMIDIAccessor*
 ShellContentRendererClient::OverrideCreateMIDIAccessor(
     WebMIDIAccessorClient* client) {