Removed default underline style in TSF.

On Windows, dictation comes as a composition and in some cases
the underline style is set as TF_LS_NONE to differentiate between
high confidence and low confidence words. This patch removes the
default initialization of underline style to solid so the dictation
composition could also apply none style when it wants to.

Bug: 1033764
Change-Id: I41f5904129686858c5d729fe26e6a312fd9beaea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134918Reviewed-by: Yohei Yukawa <yukawa@chromium.org>
Commit-Queue: Anupam Snigdha <snianu@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#756132}

ui/base/ime/win/tsf_text_store.cc

@@ -1415,28 +1415,29 @@ void TSFTextStore::GetStyle(const TF_DISPLAYATTRIBUTE& attribute,
   // any style or not.
   span->thickness = attribute.fBoldLine ? ImeTextSpan::Thickness::kThick
                                         : ImeTextSpan::Thickness::kThin;
-  span->underline_style = ImeTextSpan::UnderlineStyle::kSolid;
-  if (attribute.lsStyle != TF_LS_NONE) {
-    switch (attribute.lsStyle) {
-      case TF_LS_SOLID: {
-        span->underline_style = ImeTextSpan::UnderlineStyle::kSolid;
-        break;
-      }
-      case TF_LS_DOT: {
-        span->underline_style = ImeTextSpan::UnderlineStyle::kDot;
-        break;
-      }
-      case TF_LS_DASH: {
-        span->underline_style = ImeTextSpan::UnderlineStyle::kDash;
-        break;
-      }
-      case TF_LS_SQUIGGLE: {
-        span->underline_style = ImeTextSpan::UnderlineStyle::kSquiggle;
-        break;
-      }
-      default: {
-        span->underline_style = ImeTextSpan::UnderlineStyle::kSolid;
-      }
+  switch (attribute.lsStyle) {
+    case TF_LS_SOLID: {
+      span->underline_style = ImeTextSpan::UnderlineStyle::kSolid;
+      break;
+    }
+    case TF_LS_DOT: {
+      span->underline_style = ImeTextSpan::UnderlineStyle::kDot;
+      break;
+    }
+    case TF_LS_DASH: {
+      span->underline_style = ImeTextSpan::UnderlineStyle::kDash;
+      break;
+    }
+    case TF_LS_SQUIGGLE: {
+      span->underline_style = ImeTextSpan::UnderlineStyle::kSquiggle;
+      break;
+    }
+    case TF_LS_NONE: {
+      span->underline_style = ImeTextSpan::UnderlineStyle::kNone;
+      break;
+    }
+    default: {
+      span->underline_style = ImeTextSpan::UnderlineStyle::kSolid;
     }
   }
   if (attribute.crText.type != TF_CT_NONE) {