Bug 1544216 Part 1 - use default keyword instead of empty constructors and destructors r=birtles

dom/smil/SMILBoolType.h

@@ -39,7 +39,7 @@ class SMILBoolType : public SMILType {
 
  private:
   // Private constructor: prevent instances beyond my singleton.
-  constexpr SMILBoolType() {}
+  constexpr SMILBoolType() = default;
 };
 
 }  // namespace mozilla

dom/smil/SMILCSSValueType.h

@@ -125,7 +125,7 @@ class SMILCSSValueType : public SMILType {
 
  private:
   // Private constructor: prevent instances beyond my singleton.
-  constexpr SMILCSSValueType() {}
+  constexpr SMILCSSValueType() = default;
 };
 
 }  // namespace mozilla

dom/smil/SMILCompositor.h

@@ -38,7 +38,6 @@ class SMILCompositor : public PLDHashEntryHdr {
         mKey(std::move(toMove.mKey)),
         mAnimationFunctions(std::move(toMove.mAnimationFunctions)),
         mForceCompositing(false) {}
-  ~SMILCompositor() {}
 
   // PLDHashEntryHdr methods
   KeyTypeRef GetKey() const { return mKey; }

dom/smil/SMILEnumType.h

@@ -39,7 +39,7 @@ class SMILEnumType : public SMILType {
 
  private:
   // Private constructor: prevent instances beyond my singleton.
-  constexpr SMILEnumType() {}
+  constexpr SMILEnumType() = default;
 };
 
 }  // namespace mozilla

dom/smil/SMILFloatType.h

@@ -39,7 +39,7 @@ class SMILFloatType : public SMILType {
 
  private:
   // Private constructor: prevent instances beyond my singleton.
-  constexpr SMILFloatType() {}
+  constexpr SMILFloatType() = default;
 };
 
 }  // namespace mozilla

dom/smil/SMILIntegerType.h

@@ -34,7 +34,7 @@ class SMILIntegerType : public SMILType {
   }
 
  private:
-  constexpr SMILIntegerType() {}
+  constexpr SMILIntegerType() = default;
 };
 
 }  // namespace mozilla

dom/smil/SMILNullType.h

@@ -39,7 +39,7 @@ class SMILNullType : public SMILType {
 
  private:
   // Private constructor: prevent instances beyond my singleton.
-  constexpr SMILNullType() {}
+  constexpr SMILNullType() = default;
 };
 
 }  // namespace mozilla

dom/smil/SMILStringType.h

@@ -39,7 +39,7 @@ class SMILStringType : public SMILType {
 
  private:
   // Private constructor: prevent instances beyond my singleton.
-  constexpr SMILStringType() {}
+  constexpr SMILStringType() = default;
 };
 
 }  // namespace mozilla