Revert of Revert of ozone: gpu: Add plumbing for platform-specific gpu messaging

content/browser/gpu/gpu_process_host_ui_shim.cc

Index: content/browser/gpu/gpu_process_host_ui_shim.cc
diff --git a/content/browser/gpu/gpu_process_host_ui_shim.cc b/content/browser/gpu/gpu_process_host_ui_shim.cc
index 54c1626b6c9cb3921a6f05dbefc64b73bc08e107..a6a6805d176e57333b32d28aa817681a4c9bcca7 100644
--- a/content/browser/gpu/gpu_process_host_ui_shim.cc
+++ b/content/browser/gpu/gpu_process_host_ui_shim.cc
@@ -20,6 +20,11 @@
 #include "content/common/gpu/gpu_messages.h"
 #include "content/public/browser/browser_thread.h"
 
+#if defined(USE_OZONE)
+#include "ui/ozone/ozone_platform.h"
+#include "ui/ozone/public/gpu_platform_support_host.h"
+#endif
+
 namespace content {
 
 namespace {
@@ -90,6 +95,11 @@ void RouteToGpuProcessHostUIShimTask(int host_id, const IPC::Message& msg) {
 GpuProcessHostUIShim::GpuProcessHostUIShim(int host_id)
     : host_id_(host_id) {
   g_hosts_by_id.Pointer()->AddWithID(this, host_id_);
+#if defined(USE_OZONE)
+  ui::OzonePlatform::GetInstance()
+      ->GetGpuPlatformSupportHost()
+      ->OnChannelEstablished(host_id, this);
+#endif
 }
 
 // static
@@ -106,6 +116,12 @@ void GpuProcessHostUIShim::Destroy(int host_id, const std::string& message) {
       logging::LOG_ERROR, "GpuProcessHostUIShim",
       message);
 
+#if defined(USE_OZONE)
+  ui::OzonePlatform::GetInstance()
+      ->GetGpuPlatformSupportHost()
+      ->OnChannelDestroyed(host_id);
+#endif
+
   delete FromID(host_id);
 }
 
@@ -145,6 +161,13 @@ bool GpuProcessHostUIShim::Send(IPC::Message* msg) {
 bool GpuProcessHostUIShim::OnMessageReceived(const IPC::Message& message) {
   DCHECK(CalledOnValidThread());
 
+#if defined(USE_OZONE)
+  if (ui::OzonePlatform::GetInstance()
+          ->GetGpuPlatformSupportHost()
+          ->OnMessageReceived(message))
+    return true;
+#endif
+
   if (message.routing_id() != MSG_ROUTING_CONTROL)
     return false;