Fix VizProcessTransportFactory to use correct message loop type.

After crrev.com/677743 in-process Viz thread was started with
TYPE_DEFAULT instead of TYPE_IO that is needed to be able to use FIDL
APIs on Fuchsia. Updated it to use message type returned from
OzonePlatform::GetMessageLoopTypeForGpu().

Bug: 985084
Change-Id: I7c9cbcc0ec3d1f751f18937660c8891ed14df49b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1706621Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Auto-Submit: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#678470}

content/browser/compositor/DEPS

@@ -16,5 +16,8 @@ specific_include_rules = {
   ],
   "reflector_impl_unittest\.cc": [
     "+ui/ozone/public",
+  ],
+  "viz_process_transport_factory\.cc": [
+    "+ui/ozone/public",
   ]
 }

content/browser/compositor/viz_process_transport_factory.cc

@@ -44,6 +44,10 @@
 #include "ui/gfx/win/rendering_window_manager.h"
 #endif
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/ozone_platform.h"
+#endif
+
 namespace content {
 namespace {
 
@@ -190,8 +194,13 @@ void VizProcessTransportFactory::ConnectHostFrameSinkManager() {
 
     // GPU process access is disabled. Start a new thread to run the display
     // compositor in-process and connect HostFrameSinkManager to it.
-    viz_compositor_thread_ = std::make_unique<viz::VizCompositorThreadRunner>(
-        base::MessageLoop::TYPE_DEFAULT);
+    base::MessageLoop::Type message_loop_type = base::MessageLoop::TYPE_DEFAULT;
+#if defined(USE_OZONE)
+    message_loop_type =
+        ui::OzonePlatform::GetInstance()->GetMessageLoopTypeForGpu();
+#endif
+    viz_compositor_thread_ =
+        std::make_unique<viz::VizCompositorThreadRunner>(message_loop_type);
 
     viz::mojom::FrameSinkManagerParamsPtr params =
         viz::mojom::FrameSinkManagerParams::New();