linux_aura: Enable HIDPI support

ash/display/display_change_observer_chromeos.cc

Index: ash/display/display_change_observer_chromeos.cc
diff --git a/ash/display/display_change_observer_chromeos.cc b/ash/display/display_change_observer_chromeos.cc
index 71bdfcd2d106d61c99eaadb344673a50909ef16f..25d53fddac443e3efa0ac08a8b129b6536718060 100644
--- a/ash/display/display_change_observer_chromeos.cc
+++ b/ash/display/display_change_observer_chromeos.cc
@@ -19,6 +19,7 @@
 #include "chromeos/display/output_util.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/base/x/x11_util.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/gfx/display.h"
 
@@ -36,16 +37,6 @@ const unsigned int kHighDensityDPIThreshold = 160;
 // 1 inch in mm.
 const float kInchInMm = 25.4f;
 
-// A list of bogus sizes in mm that X detects that should be ignored.
-// See crbug.com/136533. The first element maintains the minimum
-// size required to be valid size.
-const unsigned long kInvalidDisplaySizeList[][2] = {
-  {40, 30},
-  {50, 40},
-  {160, 90},
-  {160, 100},
-};
-
 // Resolution list are sorted by the area in pixels and the larger
 // one comes first.
 struct ResolutionSorter {
@@ -59,21 +50,7 @@ struct ResolutionSorter {
 // static
 bool DisplayChangeObserver::ShouldIgnoreSize(unsigned long mm_width,

[Daniel Erat, 2013/10/29 14:28:25]

please remove this method and make the caller call
ui::IsXDisplaySizeBlackListed() directly.

also, please make the unit tests for this method test
IsXDisplaySizeBlackListed() instead, and move them to an x_util_unittest.cc
file.

[Mikhail, 2013/10/29 14:50:55]

Actually I was planning to make it as a separate CL, but sure.

                                              unsigned long mm_height) {
-  // Ignore if the reported display is smaller than minimum size.
-  if (mm_width <= kInvalidDisplaySizeList[0][0] ||
-      mm_height <= kInvalidDisplaySizeList[0][1]) {
-    LOG(WARNING) << "Smaller than minimum display size";
-    return true;
-  }
-  for (unsigned long i = 1 ; i < arraysize(kInvalidDisplaySizeList); ++i) {
-    const unsigned long* size = kInvalidDisplaySizeList[i];
-    if (mm_width == size[0] && mm_height == size[1]) {
-      LOG(WARNING) << "Black listed display size detected:"
-                   << size[0] << "x" << size[1];
-      return true;
-    }
-  }
-  return false;
+  return ui::IsXDisplaySizeBlackListed(mm_width, mm_height);
 }
 
 // static