Avoid RenderText fuzzer to try unsupported ELIDE_LONG_WORDS

Remove an unsupported eliding multiline mode: ELIDE_LONG_WORDS
The eliding mode is still supported by ElideRectangleText(...)
and still used in Canvas.

This CL only prevent an incorrect use in RenderText and remove it
from the fuzzer.

R=msw@chromium.org

Bug: 1150235
Change-Id: I53aee3ddc2ba9fd8e7b69995e25aa697644b6894
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2561438Reviewed-by: Robert Liao <robliao@chromium.org>
Reviewed-by: Keren Zhu <kerenzhu@chromium.org>
Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833826}

ui/gfx/render_text.cc

@@ -583,6 +583,9 @@ size_t RenderText::GetTextIndexOfLine(size_t line) {
 }
 
 void RenderText::SetWordWrapBehavior(WordWrapBehavior behavior) {
+  // TODO(1150235): ELIDE_LONG_WORDS is not supported.
+  DCHECK_NE(behavior, ELIDE_LONG_WORDS);
+
   if (word_wrap_behavior_ != behavior) {
     word_wrap_behavior_ = behavior;
     if (multiline_) {

ui/gfx/render_text_api_fuzzer.cc

@@ -148,14 +148,13 @@ gfx::TextStyle ConsumeStyle(FuzzedDataProvider* fdp) {
 }
 
 gfx::WordWrapBehavior ConsumeWordWrap(FuzzedDataProvider* fdp) {
-  switch (fdp->ConsumeIntegralInRange(0, 4)) {
+  // TODO(1150235): ELIDE_LONG_WORDS is not supported.
+  switch (fdp->ConsumeIntegralInRange(0, 3)) {
     case 0:
       return gfx::IGNORE_LONG_WORDS;
     case 1:
       return gfx::TRUNCATE_LONG_WORDS;
     case 2:
-      return gfx::ELIDE_LONG_WORDS;
-    case 3:
       return gfx::WRAP_LONG_WORDS;
     default:
       return gfx::IGNORE_LONG_WORDS;