<webview>: Move autosize from content to chrome

chrome/browser/guest_view/web_view/web_view_constants.cc

Index: chrome/browser/guest_view/web_view/web_view_constants.cc
diff --git a/chrome/browser/guest_view/web_view/web_view_constants.cc b/chrome/browser/guest_view/web_view/web_view_constants.cc
index d844581c9fd6800913e1a010588e121406dbdceb..10e1f2a00b9d4b797fe66a01186722c91e8f3feb 100644
--- a/chrome/browser/guest_view/web_view/web_view_constants.cc
+++ b/chrome/browser/guest_view/web_view/web_view_constants.cc
@@ -6,6 +6,13 @@
 
 namespace webview {
 
+// Attributes.
+const char kAttributeAutoSize[] = "autosize";
+const char kAttributeMaxHeight[] = "maxheight";
+const char kAttributeMaxWidth[] = "maxwidth";
+const char kAttributeMinHeight[] = "minheight";
+const char kAttributeMinWidth[] = "minwidth";
+
 // Events.
 const char kEventClose[] = "webViewInternal.onClose";
 const char kEventConsoleMessage[] = "webViewInternal.onConsoleMessage";