Fix check for PLANE_CTM on legacy

Enable universal planes when initializing the DRM device in the browser
process. This ensures all planes are exposed via DRM.

If DRM reports 0 planes (on legacy this can happen) do not report
support for PLANE_CTM otherwise the display configuration will try to
set hardware CTM.

Bug: 869901
Test: Compiled
Change-Id: I3fd09e3628e198219d8bb0b1400afd156cb4bcbe
Reviewed-on: https://chromium-review.googlesource.com/1167892
Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581911}

ui/ozone/platform/drm/common/drm_util.cc

@@ -204,7 +204,9 @@ bool HasPerPlaneColorCorrectionMatrix(const int fd, drmModeCrtc* crtc) {
     if (!FindDrmProperty(fd, plane_props.get(), "PLANE_CTM"))
       return false;
   }
-  return true;
+
+  // On legacy, if no planes are exposed then the property isn't available.
+  return plane_resources->count_planes > 0;
 }
 
 bool IsDrmModuleName(const int fd, const std::string& name) {

ui/ozone/platform/drm/host/drm_device_handle.cc

@@ -69,6 +69,9 @@ bool DrmDeviceHandle::Initialize(const base::FilePath& dev_path,
       struct drm_set_client_cap cap = {DRM_CLIENT_CAP_ATOMIC, 1};
       has_atomic_capabilities_ =
           !drmIoctl(file_.get(), DRM_IOCTL_SET_CLIENT_CAP, &cap);
+
+      cap = {DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1};
+      drmIoctl(file_.get(), DRM_IOCTL_SET_CLIENT_CAP, &cap);
       break;
     }