Strictly disable instantiation of AllStatic class

Since the intention of using AllStatic class is to provide classes that
only contain static method functions without member variables so it
doesn't have to be instantiated at all.

However, current implementation only disables dynamic instantiation, and
it can be detected at runtime by reaching UNREACHABLE().  And it can
still have instances allocated inside stack.

This blocks all those cases by deleting default constructor of AllStatic
class to prevent undesirable usage of it.

BUG=
R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2108273003
Cr-Commit-Position: refs/heads/master@{#37532}

src/allocation.cc

@@ -46,17 +46,6 @@ void Embedded::operator delete(void* p) {
   UNREACHABLE();
 }
 
-
-void* AllStatic::operator new(size_t size) {
-  UNREACHABLE();
-  return invalid;
-}
-
-
-void AllStatic::operator delete(void* p) {
-  UNREACHABLE();
-}
-
 #endif
 
 

src/allocation.h

@@ -45,12 +45,12 @@ class Embedded {
 #endif
 
 
-// Superclass for classes only using statics.
+// Superclass for classes only using static method functions.
+// The subclass of AllStatic cannot be instantiated at all.
 class AllStatic {
 #ifdef DEBUG
  public:
-  void* operator new(size_t size);
-  void operator delete(void* p);
+  AllStatic() = delete;
 #endif
 };