bindings: Window must be LocalDOMWindow by definition.

Window.idl declares that Window is ImplementedAs=LocalDOMWindow.
It also declares self/window/frames/opener/parent/top attributes
return Window, so LocalDOMWindow::self/window/frames/opener/parent/
top member functions must return LocalDOMWindow, not DOMWindow.

dcheng@, you can change Window.idl to declare ImplementedAs=DOMWindow
instead of LocalDOMWindow, if necessary.  Otherwise, please keep the
consistency here.

BUG=425623

Review URL: https://codereview.chromium.org/700803002

git-svn-id: svn://svn.chromium.org/blink/trunk@184827 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

@@ -1296,7 +1296,7 @@ void LocalDOMWindow::setDefaultStatus(const String& string)
     host->chrome().setStatusbarText(frame(), m_defaultStatus);
 }
 
-DOMWindow* LocalDOMWindow::self() const
+LocalDOMWindow* LocalDOMWindow::self() const
 {
     if (!frame())
         return 0;
@@ -1304,7 +1304,7 @@ DOMWindow* LocalDOMWindow::self() const
     return frame()->domWindow();
 }
 
-DOMWindow* LocalDOMWindow::opener() const
+LocalDOMWindow* LocalDOMWindow::opener() const
 {
     if (!frame())
         return 0;
@@ -1316,7 +1316,7 @@ DOMWindow* LocalDOMWindow::opener() const
     return opener->domWindow();
 }
 
-DOMWindow* LocalDOMWindow::parent() const
+LocalDOMWindow* LocalDOMWindow::parent() const
 {
     if (!frame())
         return 0;
@@ -1328,7 +1328,7 @@ DOMWindow* LocalDOMWindow::parent() const
     return frame()->domWindow();
 }
 
-DOMWindow* LocalDOMWindow::top() const
+LocalDOMWindow* LocalDOMWindow::top() const
 {
     if (!frame())
         return 0;

third_party/WebKit/Source/core/frame/LocalDOMWindow.h

@@ -124,10 +124,12 @@ public:
     void setStatus(const String&) override;
     String defaultStatus() const override;
     void setDefaultStatus(const String&) override;
-    DOMWindow* self() const override;
-    DOMWindow* opener() const override;
-    DOMWindow* parent() const override;
-    DOMWindow* top() const override;
+    LocalDOMWindow* self() const override;
+    LocalDOMWindow* window() const { return self(); }
+    LocalDOMWindow* frames() const { return self(); }
+    LocalDOMWindow* opener() const override;
+    LocalDOMWindow* parent() const override;
+    LocalDOMWindow* top() const override;
     Document* document() const override;
     StyleMedia* styleMedia() const override;
     double devicePixelRatio() const override;

third_party/WebKit/Source/core/frame/Window.idl

@@ -122,7 +122,7 @@
     // Self referential attributes
     [Replaceable, DoNotCheckSecurity] readonly attribute Window self;
     [DoNotCheckSecurity, Unforgeable] readonly attribute Window window;
-    [Replaceable, DoNotCheckSecurity] readonly attribute  Window frames;
+    [Replaceable, DoNotCheckSecurity] readonly attribute Window frames;
 
     [DoNotCheckSecurity, Custom=Setter] attribute Window opener;
     [Replaceable, DoNotCheckSecurity] readonly attribute Window parent;