Make CPDF_ColorState::SetPattern() less confusing.

-- avoid mixed-case local names.

Change-Id: I6ca27e61eebaefecff9b3ae5c2d0fd0b7deaab80
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/99253
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

core/fpdfapi/page/cpdf_colorstate.cpp

diff --git a/core/fpdfapi/page/cpdf_colorstate.cpp b/core/fpdfapi/page/cpdf_colorstate.cpp
index bca6e24..bcdd0e0 100644
--- a/core/fpdfapi/page/cpdf_colorstate.cpp
+++ b/core/fpdfapi/page/cpdf_colorstate.cpp
@@ -131,19 +131,16 @@
                                  FX_COLORREF* colorref) {
   DCHECK(color);
   DCHECK(colorref);
-
   color->SetValueForPattern(pattern, values);
   int R;
   int G;
   int B;
-  bool ret = color->GetRGB(&R, &G, &B);
-  if (CPDF_TilingPattern* pTilingPattern = pattern->AsTilingPattern()) {
-    if (!ret && pTilingPattern->colored()) {
-      *colorref = 0x00BFBFBF;
-      return;
-    }
+  if (color->GetRGB(&R, &G, &B)) {
+    *colorref = FXSYS_BGR(B, G, R);
+    return;
   }
-  *colorref = ret ? FXSYS_BGR(B, G, R) : 0xFFFFFFFF;
+  CPDF_TilingPattern* tiling = pattern->AsTilingPattern();
+  *colorref = tiling && tiling->colored() ? 0x00BFBFBF : 0xFFFFFFFF;
 }
 
 CPDF_ColorState::ColorData::ColorData() = default;