Change grit to depend on test data in the main repository.

tools/grit/grit/testdata/include_test.html

Index: tools/grit/grit/testdata/include_test.html
diff --git a/tools/grit/grit/testdata/include_test.html b/tools/grit/grit/testdata/include_test.html
new file mode 100644
index 0000000000000000000000000000000000000000..e08f2e2e8a296dd4e36551a95764c0c1e9e1b108
--- /dev/null
+++ b/tools/grit/grit/testdata/include_test.html
@@ -0,0 +1,31 @@
+<include src="included_sample.html">
+<if expr="True">
+should be kept
+</if>
+in the middle...
+<if expr="False">
+should be removed
+</if>
+
+<if expr="False">
+should be removed
+  <if expr="True">
+    should be removed because outer expr is False
+  </if>
+should be removed
+</if>
+
+<if expr="True">
+  <if expr="True">
+    <if expr="True">
+      nested true should be kept
+    </if>
+    <if expr="False">
+      should be removed
+    </if>
+  </if>
+  <if expr="True">
+    silbing true should be kept
+  </if>
+</if>
+at the end...