chromeos: Fix display failures when going to mirrored mode.

chromeos/display/output_util.cc

Index: chromeos/display/output_util.cc
diff --git a/chromeos/display/output_util.cc b/chromeos/display/output_util.cc
index 45f9b6ac05d0e0f4163e39dec6a824dbfcb508cf..5e223c5331681069c95565721bb98437da8a57d3 100644
--- a/chromeos/display/output_util.cc
+++ b/chromeos/display/output_util.cc
@@ -111,16 +111,6 @@ bool GetOutputDeviceData(XID output,
   return result;
 }
 
-float GetRefreshRate(const XRRModeInfo* mode_info) {
-  if (mode_info->hTotal && mode_info->vTotal) {
-    return static_cast<float>(mode_info->dotClock) /
-        (static_cast<float>(mode_info->hTotal) *
-         static_cast<float>(mode_info->vTotal));
-  } else {
-    return 0.0f;
-  }
-}
-
 }  // namespace
 
 std::string GetDisplayName(XID output_id) {
@@ -341,44 +331,6 @@ const XRRModeInfo* FindXRRModeInfo(const XRRScreenResources* screen_resources,
   return NULL;
 }
 
-// Find a mode that matches the given size with highest
-// reflesh rate.
-RRMode FindOutputModeMatchingSize(
-    const XRRScreenResources* screen_resources,
-    const XRROutputInfo* output_info,
-    size_t width,
-    size_t height) {
-  RRMode found = None;
-  float best_rate = 0;
-  bool non_interlaced_found = false;
-  for (int i = 0; i < output_info->nmode; ++i) {
-    RRMode mode = output_info->modes[i];
-    const XRRModeInfo* info = FindXRRModeInfo(screen_resources, mode);
-
-    if (info->width == width && info->height == height) {
-      float rate = GetRefreshRate(info);
-
-      if (info->modeFlags & RR_Interlace) {
-        if (non_interlaced_found)
-          continue;
-      } else {
-        // Reset the best rate if the non interlaced is
-        // found the first time.
-        if (!non_interlaced_found) {
-          best_rate = rate;
-        }
-        non_interlaced_found = true;
-      }
-      if (rate < best_rate)
-        continue;
-
-      found = mode;
-      best_rate = rate;
-    }
-  }
-  return found;
-}
-
 namespace test {
 
 XRRModeInfo CreateModeInfo(int id,