It looks like a renamed file and a new file were missing from the commit of JDK-8129988, leading to build breakage.

diffstat for 9 version:

 b/src/share/classes/sun/security/ssl/SSLContextImpl.java | 18
 b/src/share/classes/sun/security/ssl/TrustManagerFactoryImpl.java | 144 ---
 b/src/share/classes/sun/security/ssl/TrustStoreManager.java | 395 ++++++++++
 b/src/share/classes/sun/security/ssl/X509TrustManagerImpl.java | 54 -
 b/src/share/classes/sun/security/validator/TrustStoreUtil.java | 77 -
 b/src/share/classes/sun/security/validator/Validator.java | 2
 b/test/sun/security/ssl/SSLContextImpl/BadTSProvider.java | 21
 b/test/sun/security/validator/EndEntityExtensionCheck.java | 6
 8 files changed, 494 insertions(+), 223 deletions(-)

diffstat for 8 commit:
 b/src/share/classes/sun/security/ssl/SSLContextImpl.java | 18 -
 b/src/share/classes/sun/security/ssl/TrustManagerFactoryImpl.java | 146 +---------
 b/src/share/classes/sun/security/ssl/X509TrustManagerImpl.java | 54 ++-
 b/src/share/classes/sun/security/validator/Validator.java | 4
 b/test/sun/security/ssl/com/sun/net/ssl/internal/ssl/SSLContextImpl/BadTSProvider.java | 21 +
 b/test/sun/security/validator/EndEntityExtensionCheck.java | 6
 6 files changed, 83 insertions(+), 166 deletions(-)

TrustStoreManager.java is missing and TrustStoreUtil.java is not moved from src/share/classes/sun/security/validator/KeyStores.java

When bootstrapping with 7, we also hit:

/home/andrew/projects/openjdk/upstream/jdk8u-dev/jdk/src/share/classes/sun/security/ssl/TrustStoreManager.java:129: error: cannot infer type arguments for PrivilegedAction<T>
             return AccessController.doPrivileged(new PrivilegedAction<>() {
                                                                      ^
  reason: cannot use '<>' with anonymous inner classes
  where T is a type-variable:
    T extends Object declared in interface PrivilegedAction