[1/2][Ozone-Drm] Refactor GPU display management

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

Index: ui/ozone/platform/drm/common/drm_util.h
diff --git a/ui/ozone/platform/drm/common/drm_util.h b/ui/ozone/platform/drm/common/drm_util.h
index 9ea934b27e56db304da642bdeee5c6952ae73fe8..75fea7be449ce4e803ed3425916db8a8d3c67db6 100644
--- a/ui/ozone/platform/drm/common/drm_util.h
+++ b/ui/ozone/platform/drm/common/drm_util.h
@@ -8,6 +8,7 @@
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
 #include "ui/ozone/platform/drm/common/scoped_drm_types.h"
 
 typedef struct _drmModeModeInfo drmModeModeInfo;
@@ -39,6 +40,16 @@ ScopedVector<HardwareDisplayControllerInfo> GetAvailableDisplayControllerInfos(
 
 bool SameMode(const drmModeModeInfo& lhs, const drmModeModeInfo& rhs);
 
+DisplayMode_Params CreateDisplayModeParams(const drmModeModeInfo& mode);
+
+// |info| provides the DRM information related to the display, |fd| is the
+// connection to the DRM device and |index| provides a unique identifier for the
+// display. |index| will be used to create the display id.

[spang, 2015/05/12 16:58:53]

s/will be used/may be used... if no other identifier is available/

[dnicoara, 2015/05/12 18:05:02]

Added more details. It actually is used even if we have a valid EDID. It allows
us to distinguish between 2 identical displays.

+DisplaySnapshot_Params CreateDisplaySnapshotParams(
+    HardwareDisplayControllerInfo* info,
+    int fd,
+    size_t index);

[spang, 2015/05/12 16:58:53]

display_index

[dnicoara, 2015/05/12 18:05:02]

Done.

+
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_COMMON_DRM_UTIL_H_