Change ideographic space tests to use fixed `line-height`

It turned out that crbug.com/1193282 can affect the height of
lines that contains only U+3000 IDEOGRAPHIC SPACEs, because
the used fonts are not correct.

This patch applies fixed `line-height` to the tests so that
used fonts do not affect the layout.

Bug: 1193282
Change-Id: I73990d16f9d77879e9a007bb48c6c63491943400
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2789994
Commit-Queue: Kent Tamura <tkent@chromium.org>
Auto-Submit: Koji Ishii <kojii@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#867095}
diff --git a/css/css-text/white-space/reference/trailing-ideographic-space-break-spaces-001-ref.html b/css/css-text/white-space/reference/trailing-ideographic-space-break-spaces-001-ref.html
index ad629e9..293f752 100644
--- a/css/css-text/white-space/reference/trailing-ideographic-space-break-spaces-001-ref.html
+++ b/css/css-text/white-space/reference/trailing-ideographic-space-break-spaces-001-ref.html
@@ -3,7 +3,10 @@
 <title>CSS test reference</title>
 <link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com"/>
 <style>
-    div { white-space: pre; }
+    div {
+        white-space: pre;
+        line-height: 1;
+    }
 </style>
 
 <p>Test passes if the characters below are arranged in pairs with a empty line in between.</p>
diff --git a/css/css-text/white-space/trailing-ideographic-space-break-spaces-001.html b/css/css-text/white-space/trailing-ideographic-space-break-spaces-001.html
index 2ab5edf..9ecfdb3 100644
--- a/css/css-text/white-space/trailing-ideographic-space-break-spaces-001.html
+++ b/css/css-text/white-space/trailing-ideographic-space-break-spaces-001.html
@@ -10,6 +10,7 @@
 div {
     width: 3em;
     white-space: break-spaces;
+    line-height: 1;
 }
 </style>
 
diff --git a/css/css-text/white-space/trailing-ideographic-space-break-spaces-002.html b/css/css-text/white-space/trailing-ideographic-space-break-spaces-002.html
index 423dd8e..587f4e0 100644
--- a/css/css-text/white-space/trailing-ideographic-space-break-spaces-002.html
+++ b/css/css-text/white-space/trailing-ideographic-space-break-spaces-002.html
@@ -10,6 +10,7 @@
 div {
     width: 3em;
     white-space: break-spaces;
+    line-height: 1;
 }
 </style>
 
diff --git a/css/css-text/white-space/trailing-ideographic-space-break-spaces-003.html b/css/css-text/white-space/trailing-ideographic-space-break-spaces-003.html
index fe09ba7..08eacdd 100644
--- a/css/css-text/white-space/trailing-ideographic-space-break-spaces-003.html
+++ b/css/css-text/white-space/trailing-ideographic-space-break-spaces-003.html
@@ -10,6 +10,7 @@
 div {
     width: 3em;
     white-space: break-spaces;
+    line-height: 1;
 }
 </style>
 
diff --git a/css/css-text/white-space/trailing-ideographic-space-break-spaces-004.html b/css/css-text/white-space/trailing-ideographic-space-break-spaces-004.html
index bdc042e..e9c32cf 100644
--- a/css/css-text/white-space/trailing-ideographic-space-break-spaces-004.html
+++ b/css/css-text/white-space/trailing-ideographic-space-break-spaces-004.html
@@ -10,6 +10,7 @@
 div {
     width: 3em;
     white-space: break-spaces;
+    line-height: 1;
 }
 </style>
 
diff --git a/css/css-text/white-space/trailing-ideographic-space-break-spaces-005.html b/css/css-text/white-space/trailing-ideographic-space-break-spaces-005.html
index 2d31870..a8c68aa 100644
--- a/css/css-text/white-space/trailing-ideographic-space-break-spaces-005.html
+++ b/css/css-text/white-space/trailing-ideographic-space-break-spaces-005.html
@@ -10,6 +10,7 @@
 div {
     width: 3em;
     white-space: break-spaces;
+    line-height: 1;
 }
 </style>
 
diff --git a/css/css-text/white-space/trailing-ideographic-space-break-spaces-006.html b/css/css-text/white-space/trailing-ideographic-space-break-spaces-006.html
index 5ac80ad..e43d7c8 100644
--- a/css/css-text/white-space/trailing-ideographic-space-break-spaces-006.html
+++ b/css/css-text/white-space/trailing-ideographic-space-break-spaces-006.html
@@ -10,6 +10,7 @@
 div {
     width: 3em;
     white-space: break-spaces;
+    line-height: 1;
 }
 </style>