Minor bug fix for incorrect DCHECK in display util

This patch fixes an incorrect DCHECK that was landed in the previous
patch. The DHCECK_LT should instead be DCHECK_GT.

Bug: 839458
Change-Id: I4b45aae9a1cb1c3870774b4c3e2d654ffbf7bb4f
OriginalChange: I4d5bd761506c6ec14dc92b3d3a120b87e02e2cb7
Component: Display util, dsf, zoom levels
Reviewed-on: https://chromium-review.googlesource.com/1070619
Commit-Queue: Malay Keshav <malaykeshav@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561305}

ui/display/manager/display_util.cc

@@ -201,7 +201,7 @@ void InsertDsfIntoList(std::vector<float>* zoom_values, float dsf) {
     DCHECK_LT(dsf, 1.f);
     *(zoom_values->begin()) = dsf;
   } else if (it == zoom_values->end()) {
-    DCHECK_LT(dsf, 1.f);
+    DCHECK_GT(dsf, 1.f);
     *(zoom_values->rbegin()) = dsf;
   } else {
     // There can only be 1 entry for 1.f value.

ui/display/manager/display_utils_unittest.cc

@@ -209,6 +209,13 @@ TEST_F(DisplayUtilTest, InsertDsfIntoListGreaterThanUnity) {
   EXPECT_EQ(list[1].size(), kNumOfZoomFactors);
   EXPECT_EQ(list[0], list[1]);
 
+  dsf = 1.1f;
+  list[0] = {0.65f, 0.7f, 0.75f, 0.8f, 0.85f, 0.9f, 0.95f, 1.f, 1.05f};
+  list[1] = {0.65f, 0.7f, 0.75f, 0.8f, 0.85f, 0.9f, 0.95f, 1.f, dsf};
+  InsertDsfIntoList(&list[0], dsf);
+  EXPECT_EQ(list[1].size(), kNumOfZoomFactors);
+  EXPECT_EQ(list[0], list[1]);
+
   dsf = 1.1f;
   list[0] = {0.6f, 0.65f, 0.7f, 0.75f, 0.8f, 0.85f, 0.9f, 0.95f, 1.f};
   list[1] = {0.65f, 0.7f, 0.75f, 0.8f, 0.85f, 0.9f, 0.95f, 1.f, dsf};