Bug 1415470 - a11y: Fix VS2017 initializer list order warnings. r=yzen

Reorder DocAccessibleParent's and DocAccessibleChild's constructor initializer lists to fix these VS2017 warnings:

a11y/DocAccessibleParent.h(32): warning C5038: data member 'mozilla::a11y::DocAccessibleParent::mShutdown' will be initialized after data member 'mozilla::a11y::DocAccessibleParent::mEmulatedWindowHandle'

accessible/ipc/win/DocAccessibleChild.cpp(22): warning C5038: data member 'mozilla::a11y::DocAccessibleChild::mEmulatedWindowHandle' will be initialized after data member 'mozilla::a11y::DocAccessibleChild::mIsRemoteConstructed'

MozReview-Commit-ID: 8flWtpe13ob

--HG--
extra : rebase_source : 96528a886c099897df691623948d755eecda119f

accessible/ipc/DocAccessibleParent.h

@@ -29,10 +29,10 @@ class DocAccessibleParent : public ProxyAccessible,
 public:
   DocAccessibleParent() :
     ProxyAccessible(this), mParentDoc(kNoParentDoc),
-    mTopLevel(false), mShutdown(false)
 #if defined(XP_WIN)
-                                      , mEmulatedWindowHandle(nullptr)
+    mEmulatedWindowHandle(nullptr),
 #endif // defined(XP_WIN)
+    mTopLevel(false), mShutdown(false)
   {
     MOZ_COUNT_CTOR_INHERITED(DocAccessibleParent, ProxyAccessible);
     sMaxDocID++;
@@ -40,6 +40,7 @@ public:
     MOZ_ASSERT(!LiveDocs().Get(mActorID));
     LiveDocs().Put(mActorID, this);
   }
+
   ~DocAccessibleParent()
   {
     LiveDocs().Remove(mActorID);

accessible/ipc/win/DocAccessibleChild.cpp

@@ -19,8 +19,8 @@ static StaticAutoPtr<PlatformChild> sPlatformChild;
 
 DocAccessibleChild::DocAccessibleChild(DocAccessible* aDoc, IProtocol* aManager)
   : DocAccessibleChildBase(aDoc)
-  , mEmulatedWindowHandle(nullptr)
   , mIsRemoteConstructed(false)
+  , mEmulatedWindowHandle(nullptr)
 {
   MOZ_COUNT_CTOR_INHERITED(DocAccessibleChild, DocAccessibleChildBase);
   if (!sPlatformChild) {
@@ -318,4 +318,3 @@ DocAccessibleChild::RecvRestoreFocus()
 
 } // namespace a11y
 } // namespace mozilla
-