Revert of replace COMPILE_ASSERT with static_assert in chrome/installer/

chrome/installer/mini_installer/mini_string.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_INSTALLER_MINI_INSTALLER_MINI_STRING_H_
 #define CHROME_INSTALLER_MINI_INSTALLER_MINI_STRING_H_
 
+#ifndef COMPILE_ASSERT
+// COMPILE_ASSERT macro borrowed from basictypes.h
+template <bool>
+struct CompileAssert {};
+#define COMPILE_ASSERT(expr, msg) \
+    typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
+#endif
 
 namespace mini_installer {
 
 // NOTE: Do not assume that these string functions support UTF encoding.
 // This is fine for the purposes of the mini_installer, but you have
 // been warned!
 
 // Formats a sequence of |bytes| as hex.  The |str| buffer must have room for
 // at least 2*|size| + 1.
 bool HexEncode(const void* bytes, size_t size, wchar_t* str, size_t str_size);
@@ skipping 40 matching lines @@
 // terminator.
 wchar_t* GetNameFromPathExt(wchar_t* path, size_t size);
 
 // A string class that manages a fixed size buffer on the stack.
 // The methods in the class are based on the above string methods and the
 // class additionally is careful about proper buffer termination.
 template <size_t kCapacity>
 class StackString {
  public:
   StackString() {
-    static_assert(kCapacity != 0, "invalid buffer size");
+    COMPILE_ASSERT(kCapacity != 0, invalid_buffer_size);
     buffer_[kCapacity] = L'\0';  // We always reserve 1 more than asked for.
     clear();
   }
 
   // We do not expose a constructor that accepts a string pointer on purpose.
   // We expect the caller to call assign() and handle failures.
 
   // Returns the number of reserved characters in this buffer, _including_
   // the reserved char for the terminator.
   size_t capacity() const {
@@ skipping 51 matching lines @@
   wchar_t buffer_[kCapacity + 1];
 
  private:
   StackString(const StackString&);
   StackString& operator=(const StackString&);
 };
 
 }  // namespace mini_installer
 
 #endif  // CHROME_INSTALLER_MINI_INSTALLER_MINI_STRING_H_