--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -1791,18 +1791,16 @@ GetHyphenTextRun(gfxTextRun* aTextRun, g
 }
 
 static gfxFont::Metrics
 GetFirstFontMetrics(gfxFontGroup* aFontGroup)
 {
   if (!aFontGroup)
     return gfxFont::Metrics();
   gfxFont* font = aFontGroup->GetFirstValidFont();
-  if (!font)
-    return gfxFont::Metrics();
   return font->GetMetrics(gfxFont::eHorizontal); // XXX vertical
 }
 
 PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_NORMAL == 0);
 PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_PRE == 1);
 PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_NOWRAP == 2);
 PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_PRE_WRAP == 3);
 PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_PRE_LINE == 4);
@@ -5677,18 +5675,16 @@ nsTextFrame::PaintTextSelectionDecoratio
       for (int32_t i = start; i < end; ++i) {
         selectedChars[i] = sdptr;
       }
     }
     sdptr = sdptr->mNext;
   }
 
   gfxFont* firstFont = aProvider.GetFontGroup()->GetFirstValidFont();
-  if (!firstFont)
-    return; // OOM
   gfxFont::Metrics
     decorationMetrics(firstFont->GetMetrics(gfxFont::eHorizontal)); // XXX vertical?
   decorationMetrics.underlineOffset =
     aProvider.GetFontGroup()->GetUnderlineOffset();
 
   gfxFloat startXOffset = aTextBaselinePt.x - aFramePt.x;
   SelectionIterator iterator(selectedChars, aContentOffset, aContentLength,
                              aProvider, mTextRun, startXOffset);
@@ -6372,18 +6368,16 @@ nsTextFrame::CombineSelectionUnderlineRe
 
   nsRect givenRect = aRect;
 
   nsRefPtr<nsFontMetrics> fm;
   nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
                                         GetFontSizeInflation());
   gfxFontGroup* fontGroup = fm->GetThebesFontGroup();
   gfxFont* firstFont = fontGroup->GetFirstValidFont();
-  if (!firstFont)
-    return false; // OOM
   const gfxFont::Metrics& metrics =
     firstFont->GetMetrics(gfxFont::eHorizontal); // XXX vertical?
   gfxFloat underlineOffset = fontGroup->GetUnderlineOffset();
   gfxFloat ascent = aPresContext->AppUnitsToGfxUnits(mAscent);
   gfxFloat descentLimit =
     ComputeDescentLimitForSelectionUnderline(aPresContext, this, metrics);
 
   SelectionDetails *details = GetSelectionDetails();

--- a/layout/mathml/nsMathMLChar.cpp
+++ b/layout/mathml/nsMathMLChar.cpp
@@ -992,20 +992,18 @@ nsMathMLChar::SetFontFamily(nsPresContex
                     gfxFont::eHorizontal,
                     aPresContext->GetUserFontSet(),
                     aPresContext->GetTextPerfMetrics(),
                     *getter_AddRefs(fm));
     // Set the font if it is an unicode table
     // or if the same family name has been found
     gfxFont *firstFont = fm->GetThebesFontGroup()->GetFirstValidFont();
     FontFamilyList firstFontList;
-    if (firstFont) {
-      firstFontList.Append(
-        FontFamilyName(firstFont->GetFontEntry()->FamilyName(), eUnquotedName));
-    }
+    firstFontList.Append(
+      FontFamilyName(firstFont->GetFontEntry()->FamilyName(), eUnquotedName));
     if (aGlyphTable == &gGlyphTableList->mUnicodeTable ||
         firstFontList == familyList) {
       aFont.fontlist = familyList;
       *aFontGroup = fm->GetThebesFontGroup();
     } else {
       return false; // We did not set the font
     }
   }