Preliminary metro snap plumbing.

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 9f517bfc47420b2889dd38a097d416cc85965e5e..86419fc0e22b86411d7ca653dd9d231381d2327d 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -815,6 +815,67 @@ void BrowserView::FullScreenStateChanged() {
   }
 }
 
+#if defined(OS_WIN)
+void BrowserView::ToggleMetroSnapMode(bool enable) {
+  // Reduce jankiness during the following position changes by:
+  //   * Hiding the window until it's in the final position
+  //   * Ignoring all intervening Layout() calls, which resize the webpage and
+  //     thus are slow and look ugly
+  ignore_layout_ = true;
+  LocationBarView* location_bar = GetLocationBarView();
+#if !defined(USE_AURA)
+  OmniboxViewWin* omnibox_view =
+      static_cast<OmniboxViewWin*>(location_bar->GetLocationEntry());
+  static_cast<views::NativeWidgetWin*>(frame_->native_widget())->
+    PushForceHidden();
+#endif
+
+  if (enable) {
+    // Move focus out of the location bar if necessary.
+    views::FocusManager* focus_manager = GetFocusManager();
+    DCHECK(focus_manager);
+    // Look for focus in the location bar itself or any child view.
+    if (location_bar->Contains(focus_manager->GetFocusedView()))
+      focus_manager->ClearFocus();
+
+#if !defined(USE_AURA)
+    // If we don't hide the edit and force it to not show until we come out of
+    // fullscreen, then if the user was on the New Tab Page, the edit contents
+    // will appear atop the web contents once we go into fullscreen mode.  This
+    // has something to do with how we move the main window while it's hidden;
+    // if we don't hide the main window below, we don't get this problem.
+    omnibox_view->set_force_hidden(true);
+    ShowWindow(omnibox_view->m_hWnd, SW_HIDE);
+#endif
+  } else {
+#if !defined(USE_AURA)
+    // Show the edit again since we're no longer in fullscreen mode.
+    omnibox_view->set_force_hidden(false);
+    ShowWindow(omnibox_view->m_hWnd, SW_SHOW);
+#endif
+  }
+
+  // Enter metro snap mode.
+  static_cast<views::NativeWidgetWin*>(
+      frame_->native_widget())->SetMetroSnapFullscreen(enable);
+
+  // Update various state as if we were in fullscreen mode.
+  // TODO(robertshield): This may need to be modified for metro snap
+  // mode - especially the command state changes.
+  browser_->WindowFullscreenStateChanged();
+
+  // Undo our anti-jankiness hacks and force the window to re-layout now that
+  // it's in its final position.
+  ignore_layout_ = false;
+  Layout();
+
+#if !defined(USE_AURA)
+  static_cast<views::NativeWidgetWin*>(
+    frame_->native_widget())->PopForceHidden();
+#endif
+}
+#endif  // defined(OS_WIN)
+
 void BrowserView::RestoreFocus() {
   WebContents* selected_web_contents = GetSelectedWebContents();
   if (selected_web_contents)
@@ -2106,7 +2167,6 @@ void BrowserView::ProcessFullscreen(bool fullscreen,
 
   // Toggle fullscreen mode.
   frame_->SetFullscreen(fullscreen);
-
   browser_->WindowFullscreenStateChanged();
 
   if (fullscreen) {