Move allow_character_break property to RenderText.

ui/gfx/render_text_unittest.cc

Index: ui/gfx/render_text_unittest.cc
diff --git a/ui/gfx/render_text_unittest.cc b/ui/gfx/render_text_unittest.cc
index 42825579ec6cb0b68fe701de431a2c1444d5c1f7..c9059aa9444426dd5b224285c9e7922aa051903d 100644
--- a/ui/gfx/render_text_unittest.cc
+++ b/ui/gfx/render_text_unittest.cc
@@ -2262,6 +2262,26 @@ TEST_F(RenderTextTest, Multiline_HorizontalAlignment) {
   }
 }
 
+TEST_F(RenderTextTest, Multiline_AllowCharacterBreak) {
+  RenderTextHarfBuzz render_text;
+  render_text.SetMultiline(true);
+  render_text.SetText(ASCIIToUTF16("foo bar baz"));
+  Size ideal_size = render_text.GetStringSize();
+
+  render_text.SetDisplayRect(
+      Rect(0, 0, ideal_size.width() / 2, ideal_size.height()));
+  render_text.SetAllowCharacterBreak(true);
+
+  Canvas canvas;
+  render_text.Draw(&canvas);
+  EXPECT_LE(2u, render_text.lines().size());
+  Range char_range = render_text.lines()[0].segments[0].char_range;
+  EXPECT_EQ(0u, char_range.start());
+  // Broken in the middle of the second word "bar".
+  EXPECT_LT(4u, char_range.end());
+  EXPECT_GT(8u, char_range.end());
+}
+
 TEST_F(RenderTextTest, NewlineWithoutMultilineFlag) {
   const wchar_t* kTestStrings[] = {
     L"abc\ndef", L"a \n b ", L"ab\n", L"a\n\nb", L"\nab", L"\n",