Add parentheses to appease -Wstring-concatenation

Bug: 1114873
Change-Id: Ic4c6561d5cdaf55b844dc96be9d9c50a96c08303
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2358031Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: Arthur Eubanks <aeubanks@google.com>
Cr-Commit-Position: refs/heads/master@{#798387}

ui/gfx/render_text_unittest.cc

@@ -6828,8 +6828,8 @@ TEST_F(RenderTextTest, DISABLED_TextDoesntClip) {
       // "TEST_______",
       "TEST some stuff", "WWWWWWWWWW", "gAXAXAXAXAXAXA",
       "g\u00C5X\u00C5X\u00C5X\u00C5X\u00C5X\u00C5X\u00C5",
-      "\u0647\u0654\u0647\u0654\u0647\u0654\u0647\u0654\u0645\u0631\u062D"
-      "\u0628\u0627"};
+      ("\u0647\u0654\u0647\u0654\u0647\u0654\u0647\u0654\u0645\u0631\u062D"
+       "\u0628\u0627")};
   const Size kCanvasSize(300, 50);
   const int kTestSize = 10;