Use C++11 alignment primitives

base/containers/stack_container.h

Index: base/containers/stack_container.h
diff --git a/base/containers/stack_container.h b/base/containers/stack_container.h
index 5090aaff3eae78f4392fcdc6df5e3d6a88c2ced5..bbc793623f31f1b478e24d59c8e575b7b69f3279 100644
--- a/base/containers/stack_container.h
+++ b/base/containers/stack_container.h
@@ -10,7 +10,6 @@
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/aligned_memory.h"
 #include "build/build_config.h"
 
 namespace base {
@@ -47,17 +46,18 @@ class StackAllocator : public std::allocator<T> {
     }
 
     // Casts the buffer in its right type.
-    T* stack_buffer() { return stack_buffer_.template data_as<T>(); }
+    T* stack_buffer() { return reinterpret_cast<T*>(&stack_buffer_); }
     const T* stack_buffer() const {
-      return stack_buffer_.template data_as<T>();
+      return reinterpret_cast<const T*>(&stack_buffer_);
     }
 
     // The buffer itself. It is not of type T because we don't want the
     // constructors and destructors to be automatically called. Define a POD
     // buffer of the right size instead.
-    base::AlignedMemory<sizeof(T[stack_capacity]), ALIGNOF(T)> stack_buffer_;
+    typename std::aligned_storage<sizeof(T[stack_capacity]), alignof(T)>::type

[danakj, 2017/06/12 18:32:10]

Since you're having issues maybe we can/should split the removal of ALIGNOF()
from the removal of base::AlignedMemory?

+        stack_buffer_;
 #if defined(__GNUC__) && !defined(ARCH_CPU_X86_FAMILY)
-    static_assert(ALIGNOF(T) <= 16, "http://crbug.com/115612");
+    static_assert(alignof(T) <= 16, "http://crbug.com/115612");
 #endif
 
     // Set when the stack buffer is used for an allocation. We do not track