Add extension API to change window show state using chrome.windows.update().

chrome/browser/ui/views/frame/browser_view.cc

Index: chrome/browser/ui/views/frame/browser_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_view.cc b/chrome/browser/ui/views/frame/browser_view.cc
index 711715d5705a956aa711c98732be20974088ba6e..cd6574904c43377a85b6822d6dc4e40f66fc9108 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -771,6 +771,18 @@ bool BrowserView::IsMinimized() const {
   return frame_->IsMinimized();
 }
 
+void BrowserView::Maximize() {
+  frame_->Maximize();
+}
+
+void BrowserView::Minimize() {
+  frame_->Minimize();
+}
+
+void BrowserView::Restore() {
+  frame_->Restore();
+}
+
 void BrowserView::EnterFullscreen(
     const GURL& url, FullscreenExitBubbleType bubble_type) {
   if (IsFullscreen())