(no bug) Tweak some source files in layout to have correct number of newline characters at the end (exactly 1). (no review, whitespace-only, DONTBUILD)

MozReview-Commit-ID: 1hEEkCMy0pL

layout/base/MobileViewportManager.h

@@ -95,4 +95,3 @@ private:
 };
 
 #endif
-

layout/base/ZoomConstraintsClient.h

@@ -44,4 +44,3 @@ private:
 };
 
 #endif
-

layout/style/GenericSpecifiedValuesInlines.h

@@ -160,4 +160,4 @@ GenericSpecifiedValues::SetTextDecorationColorOverride()
 
 } // namespace mozilla
 
-#endif // mozilla_GenericSpecifiedValuesInlines_h
+#endif // mozilla_GenericSpecifiedValuesInlines_h

layout/svg/nsSVGUtils.cpp

@@ -1874,4 +1874,4 @@ nsSVGUtils::GetCSSPxToDevPxMatrix(nsIFrame* aNonSVGFrame)
   return gfxMatrix(devPxPerCSSPx, 0.0,
                    0.0, devPxPerCSSPx,
                    0.0, 0.0);
-}
+}