Re-land 16025005 with fix for statics perf issue

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index 5e74dc4557e40d43fae9fa619c4c936dce33152e..0ec76a124bc5447afb6a134e8c07aa91fcfbbbfc 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -31,6 +31,7 @@
 #include "content/renderer/hyphenator/hyphenator.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/renderer_webaudiodevice_impl.h"
+#include "content/renderer/media/renderer_webmidiaccessor_impl.h"
 #include "content/renderer/media/webcontentdecryptionmodule_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_clipboard_client.h"
@@ -91,6 +92,7 @@ using WebKit::WebFileSystem;
 using WebKit::WebFrame;
 using WebKit::WebGamepads;
 using WebKit::WebIDBFactory;
+using WebKit::WebMIDIAccessor;
 using WebKit::Platform;
 using WebKit::WebMediaStreamCenter;
 using WebKit::WebMediaStreamCenterClient;
@@ -771,6 +773,14 @@ RendererWebKitPlatformSupportImpl::createContentDecryptionModule(
 
 //------------------------------------------------------------------------------
 
+WebKit::WebMIDIAccessor*
+RendererWebKitPlatformSupportImpl::createMIDIAccessor(
+    WebKit::WebMIDIAccessorClient* client) {
+  return new RendererWebMIDIAccessorImpl(client);
+}
+
+//------------------------------------------------------------------------------
+
 WebKit::WebString
 RendererWebKitPlatformSupportImpl::signedPublicKeyAndChallengeString(
     unsigned key_size_index,