drm: remove unused constructor of DrmDevica and GbmDevice.

Review URL: https://codereview.chromium.org/1145193002

Cr-Commit-Position: refs/heads/master@{#330733}

ui/ozone/platform/drm/gpu/drm_device.cc

@@ -268,17 +268,6 @@ class DrmDevice::IOWatcher
   DISALLOW_COPY_AND_ASSIGN(IOWatcher);
 };
 
-DrmDevice::DrmDevice(const base::FilePath& device_path)
-    : device_path_(device_path),
-      file_(device_path,
-            base::File::FLAG_OPEN | base::File::FLAG_READ |
-                base::File::FLAG_WRITE),
-      page_flip_manager_(new PageFlipManager()) {
-  LOG_IF(FATAL, !file_.IsValid())
-      << "Failed to open '" << device_path_.value()
-      << "': " << base::File::ErrorToString(file_.error_details());
-}
-
 DrmDevice::DrmDevice(const base::FilePath& device_path, base::File file)
     : device_path_(device_path),
       file_(file.Pass()),

ui/ozone/platform/drm/gpu/drm_device.h

@@ -45,7 +45,6 @@ class OZONE_EXPORT DrmDevice : public base::RefCountedThreadSafe<DrmDevice> {
                               unsigned int /* seconds */,
                               unsigned int /* useconds */)> PageFlipCallback;
 
-  DrmDevice(const base::FilePath& device_path);
   DrmDevice(const base::FilePath& device_path, base::File file);
 
   // Open device.

ui/ozone/platform/drm/gpu/gbm_device.cc

@@ -8,10 +8,6 @@
 
 namespace ui {
 
-GbmDevice::GbmDevice(const base::FilePath& device_path)
-    : DrmDevice(device_path), device_(nullptr) {
-}
-
 GbmDevice::GbmDevice(const base::FilePath& device_path, base::File file)
     : DrmDevice(device_path, file.Pass()), device_(nullptr) {
 }

ui/ozone/platform/drm/gpu/gbm_device.h

@@ -13,7 +13,6 @@ namespace ui {
 
 class GbmDevice : public DrmDevice {
  public:
-  GbmDevice(const base::FilePath& device_path);
   GbmDevice(const base::FilePath& device_path, base::File file);
 
   gbm_device* device() const { return device_; }