Cleanup: Forward declare MojoApplicationHost in render_process_host_impl.h,...

Cleanup: Forward declare MojoApplicationHost in render_process_host_impl.h, instead of including the header.

R=sky@chromium.org

Review URL: https://codereview.chromium.org/469803002

Cr-Commit-Position: refs/heads/master@{#289383}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289383 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/render_process_host_impl.cc

@@ -69,6 +69,7 @@
 #include "content/browser/media/midi_host.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/mime_registry_message_filter.h"
+#include "content/browser/mojo/mojo_application_host.h"
 #include "content/browser/plugin_service_impl.h"
 #include "content/browser/profiler_message_filter.h"
 #include "content/browser/push_messaging_message_filter.h"

content/browser/renderer_host/render_process_host_impl.h

@@ -15,7 +15,6 @@
 #include "base/timer/timer.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
-#include "content/browser/mojo/mojo_application_host.h"
 #include "content/browser/power_monitor_message_broadcaster.h"
 #include "content/common/content_export.h"
 #include "content/common/mojo/service_registry_impl.h"
@@ -46,6 +45,7 @@ class AudioRendererHost;
 class BrowserDemuxerAndroid;
 class GpuMessageFilter;
 class MessagePortMessageFilter;
+class MojoApplicationHost;
 #if defined(ENABLE_WEBRTC)
 class P2PSocketDispatcherHost;
 #endif