linux_aura: Enable HIDPI support

ui/base/x/x11_util.cc

Index: ui/base/x/x11_util.cc
diff --git a/ui/base/x/x11_util.cc b/ui/base/x/x11_util.cc
index 348a9c1489854af6c549ff47b9599dab386fe943..48c9e6106aed6995a56654f3af580db216697582 100644
--- a/ui/base/x/x11_util.cc
+++ b/ui/base/x/x11_util.cc
@@ -259,6 +259,16 @@ bool IsShapeAvailable() {
 
 }
 
+// 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},
+};
+
 }  // namespace
 
 bool XDisplayExists() {
@@ -1313,6 +1323,25 @@ bool IsX11WindowFullScreen(XID window) {
 #endif
 }
 
+bool IsXDisplaySizeBlackListed(unsigned long mm_width,
+                               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]) {

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

nit: indent this two more spaces to line up with the 'mm' on the previous line

+    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;
+}
+
 const unsigned char* XRefcountedMemory::front() const {
   return x11_data_;
 }