Changes imported from Abseil "staging" branch:

  - 5b675ef65e4977b3ac778a75a21e99db1ebe78e7 Remove "not an official google project" disclaimer. by Abseil Team <absl-team@google.com>
  - 77d2aacc03efe6841612b38bcbb745dde1ad7d3e Avoid weak virtual table warnings (-Wweak-vtables) and re... by Abseil Team <absl-team@google.com>

GitOrigin-RevId: 5b675ef65e4977b3ac778a75a21e99db1ebe78e7
Change-Id: Ia0d1d6e39169c7ad9783d25dc92dad041de3a966

1 files changed, 4 insertions, 3 deletions

diff --git a/absl/base/internal/malloc_extension.h b/absl/base/internal/malloc_extension.h
index 46b767ff..75a00ce9 100644
--- a/absl/base/internal/malloc_extension.h
+++ b/absl/base/internal/malloc_extension.h
@@ -388,6 +388,9 @@ class MallocExtensionWriter {
   MallocExtensionWriter() {}
   MallocExtensionWriter(const MallocExtensionWriter&) = delete;
   MallocExtensionWriter& operator=(const MallocExtensionWriter&) = delete;
+
+ private:
+  virtual void UnusedKeyMethod();  // Dummy key method to avoid weak vtable.
 };
 
 // A subclass that writes to the std::string "out".  NOTE: The generated
@@ -396,9 +399,7 @@ class MallocExtensionWriter {
 class StringMallocExtensionWriter : public MallocExtensionWriter {
  public:
   explicit StringMallocExtensionWriter(std::string* out) : out_(out) {}
-  virtual void Write(const char* buf, int len) {
-    out_->append(buf, len);
-  }
+  void Write(const char* buf, int len) override;
 
  private:
   std::string* const out_;