Add missing noexcept specifiers to move ctors and assigns

The declarations of move ctors and assigns of
DisjointRangeLockManager::LockRequest, ScopesLockManager::ScopeLock and
ResolveProxyMsgHelper::PendingRequest have `noexcept` specifier, but
their implementations don't. This is OK in C++14, but causes compile
errors in C++17.

This CL adds missing `noexcept` for them.

Bug: 752720
Change-Id: I849f613c63c990afd23c590a9567069b772146d1
Reviewed-on: https://chromium-review.googlesource.com/1175656Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583319}

content/browser/indexed_db/scopes/disjoint_range_lock_manager.cc

@@ -10,13 +10,14 @@ DisjointRangeLockManager::LockRequest::LockRequest() = default;
 DisjointRangeLockManager::LockRequest::LockRequest(LockType type,
                                                    LockAquiredCallback callback)
     : requested_type(type), callback(std::move(callback)) {}
-DisjointRangeLockManager::LockRequest::LockRequest(LockRequest&&) = default;
+DisjointRangeLockManager::LockRequest::LockRequest(LockRequest&&) noexcept =
+    default;
 DisjointRangeLockManager::LockRequest::~LockRequest() = default;
 DisjointRangeLockManager::Lock::Lock() = default;
-DisjointRangeLockManager::Lock::Lock(Lock&&) = default;
+DisjointRangeLockManager::Lock::Lock(Lock&&) noexcept = default;
 DisjointRangeLockManager::Lock::~Lock() = default;
 DisjointRangeLockManager::Lock& DisjointRangeLockManager::Lock::operator=(
-    DisjointRangeLockManager::Lock&&) = default;
+    DisjointRangeLockManager::Lock&&) noexcept = default;
 
 DisjointRangeLockManager::DisjointRangeLockManager(
     int level_count,

content/browser/indexed_db/scopes/scopes_lock_manager.cc

@@ -12,7 +12,7 @@ ScopesLockManager::LockRange::LockRange(std::string begin, std::string end)
     : begin(std::move(begin)), end(std::move(end)) {}
 
 ScopesLockManager::ScopeLock::ScopeLock() = default;
-ScopesLockManager::ScopeLock::ScopeLock(ScopeLock&& other) {
+ScopesLockManager::ScopeLock::ScopeLock(ScopeLock&& other) noexcept {
   DCHECK(!this->is_locked_) << "Cannot move a lock onto an active lock.";
   this->is_locked_ = other.is_locked_;
   this->range_ = std::move(other.range_);
@@ -29,7 +29,7 @@ ScopesLockManager::ScopeLock::ScopeLock(LockRange range,
       closure_runner_(std::move(closure)) {}
 
 ScopesLockManager::ScopeLock& ScopesLockManager::ScopeLock::operator=(
-    ScopesLockManager::ScopeLock&& other) {
+    ScopesLockManager::ScopeLock&& other) noexcept {
   DCHECK(!this->is_locked_);
   this->is_locked_ = other.is_locked_;
   this->range_ = std::move(other.range_);

content/browser/resolve_proxy_msg_helper.cc

@@ -125,7 +125,7 @@ ResolveProxyMsgHelper::PendingRequest::PendingRequest(const GURL& url,
     : url(url), reply_msg(reply_msg) {}
 
 ResolveProxyMsgHelper::PendingRequest::PendingRequest(
-    PendingRequest&& pending_request) = default;
+    PendingRequest&& pending_request) noexcept = default;
 
 ResolveProxyMsgHelper::PendingRequest::~PendingRequest() noexcept = default;