Update from https://crrev.com/317530

tools/clang/plugins/FindBadConstructsConsumer.cpp

Index: tools/clang/plugins/FindBadConstructsConsumer.cpp
diff --git a/tools/clang/plugins/FindBadConstructsConsumer.cpp b/tools/clang/plugins/FindBadConstructsConsumer.cpp
index 46e1df851b5358c2b31e1da669c8eaf0fec60314..fe868c01de6cab10389a46321e50f0f328bd0e0a 100644
--- a/tools/clang/plugins/FindBadConstructsConsumer.cpp
+++ b/tools/clang/plugins/FindBadConstructsConsumer.cpp
@@ -283,6 +283,9 @@ void FindBadConstructsConsumer::CheckCtorDtorWeight(
       for (CXXRecordDecl::ctor_iterator it = record->ctor_begin();
            it != record->ctor_end();
            ++it) {
+        // The current check is buggy. An implicit copy constructor does not
+        // have an inline body, so this check never fires for classes with a
+        // user-declared out-of-line constructor.
         if (it->hasInlineBody()) {
           if (it->isCopyConstructor() &&
               !record->hasUserDeclaredCopyConstructor()) {
@@ -293,6 +296,15 @@ void FindBadConstructsConsumer::CheckCtorDtorWeight(
             emitWarning(it->getInnerLocStart(),
                         "Complex constructor has an inlined body.");
           }
+        } else if (it->isInlined() && (!it->isCopyOrMoveConstructor() ||
+                                       it->isExplicitlyDefaulted())) {
+          // isInlined() is a more reliable check than hasInlineBody(), but
+          // unfortunately, it results in warnings for implicit copy/move
+          // constructors in the previously mentioned situation. To preserve
+          // compatibility with existing Chromium code, only warn if it's an
+          // explicitly defaulted copy or move constructor.
+          emitWarning(it->getInnerLocStart(),
+                      "Complex constructor has an inlined body.");
         }
       }
     }
@@ -306,7 +318,7 @@ void FindBadConstructsConsumer::CheckCtorDtorWeight(
                   "Complex class/struct needs an explicit out-of-line "
                   "destructor.");
     } else if (CXXDestructorDecl* dtor = record->getDestructor()) {
-      if (dtor->hasInlineBody()) {
+      if (dtor->isInlined()) {
         emitWarning(dtor->getInnerLocStart(),
                     "Complex destructor has an inline body.");
       }
@@ -331,8 +343,7 @@ bool FindBadConstructsConsumer::IsMethodInBannedOrTestingNamespace(
         // magic to try to make sure SetUp()/TearDown() aren't capitalized
         // incorrectly, but having the plugin enforce override is also nice.
         (InTestingNamespace(overridden) &&
-         (!options_.strict_virtual_specifiers ||
-          !IsGtestTestFixture(overridden->getParent())))) {
+         !IsGtestTestFixture(overridden->getParent()))) {
       return true;
     }
   }
@@ -393,20 +404,13 @@ void FindBadConstructsConsumer::CheckVirtualSpecifiers(
   OverrideAttr* override_attr = method->getAttr<OverrideAttr>();
   FinalAttr* final_attr = method->getAttr<FinalAttr>();
 
-  if (method->isPure() && !options_.strict_virtual_specifiers)
-    return;
-
   if (IsMethodInBannedOrTestingNamespace(method))
     return;
 
-  if (isa<CXXDestructorDecl>(method) && !options_.strict_virtual_specifiers)
-    return;
-
   SourceManager& manager = instance().getSourceManager();
 
   // Complain if a method is annotated virtual && (override || final).
-  if (has_virtual && (override_attr || final_attr) &&
-      options_.strict_virtual_specifiers) {
+  if (has_virtual && (override_attr || final_attr)) {
     diagnostic().Report(method->getLocStart(),
                         diag_redundant_virtual_specifier_)
         << "'virtual'"
@@ -436,14 +440,14 @@ void FindBadConstructsConsumer::CheckVirtualSpecifiers(
     }
   }
 
-  if (final_attr && override_attr && options_.strict_virtual_specifiers) {
+  if (final_attr && override_attr) {
     diagnostic().Report(override_attr->getLocation(),
                         diag_redundant_virtual_specifier_)
         << override_attr << final_attr
         << FixItHint::CreateRemoval(override_attr->getRange());
   }
 
-  if (final_attr && !is_override && options_.strict_virtual_specifiers) {
+  if (final_attr && !is_override) {
     diagnostic().Report(method->getLocStart(),
                         diag_base_method_virtual_and_final_)
         << FixItRemovalForVirtual(manager, method)