libchrome: Several upstreamable fixes from libchrome

crypto/secure_hash.cc

Index: crypto/secure_hash.cc
diff --git a/crypto/secure_hash.cc b/crypto/secure_hash.cc
index 2a5a1f02089e6f1ddd24523ab6f39fd31bea744a..fbbed777e11896cfdc04ef1617fa2e7cabdf71ab 100644
--- a/crypto/secure_hash.cc
+++ b/crypto/secure_hash.cc
@@ -22,7 +22,7 @@ class SecureHashSHA256 : public SecureHash {
     SHA256_Init(&ctx_);
   }
 
-  SecureHashSHA256(const SecureHashSHA256& other) {
+  SecureHashSHA256(const SecureHashSHA256& other) : SecureHash() {

[Ryan Sleevi, 2016/05/21 10:33:33]

Why. The existing code is doing the right thing.

[Luis Héctor Chávez, 2016/05/24 15:27:53]

Nevermind, I realized the branch I was building this on used an older version of
gcc. Doesn't reproduce with other versions of gcc or clang, so removed this.

     memcpy(&ctx_, &other.ctx_, sizeof(ctx_));
   }