components: Create web_modal component.

chrome/browser/ui/views/frame/browser_view_layout.h

Index: chrome/browser/ui/views/frame/browser_view_layout.h
diff --git a/chrome/browser/ui/views/frame/browser_view_layout.h b/chrome/browser/ui/views/frame/browser_view_layout.h
index a02642242e64be080b4fbf42b4b69c6e0b8d4470..31110ddd86a71f876bb0fef0d39c83834d09e2d1 100644
--- a/chrome/browser/ui/views/frame/browser_view_layout.h
+++ b/chrome/browser/ui/views/frame/browser_view_layout.h
@@ -22,8 +22,6 @@ class InfoBarContainerView;
 class OverlayContainer;
 class TabContentsContainer;
 class TabStrip;
-class TopContainerView;
-class WebContentsModalDialogHost;
 
 namespace gfx {
 class Point;
@@ -34,6 +32,10 @@ namespace views {
 class SingleSplitView;
 }
 
+namespace web_modal {
+class WebContentsModalDialogHost;
+}
+
 // The layout manager used in chrome browser.
 class BrowserViewLayout : public views::LayoutManager {
  public:
@@ -71,7 +73,7 @@ class BrowserViewLayout : public views::LayoutManager {
     download_shelf_ = download_shelf;
   }
 
-  WebContentsModalDialogHost* GetWebContentsModalDialogHost();
+  web_modal::WebContentsModalDialogHost* GetWebContentsModalDialogHost();
 
   // Returns the minimum size of the browser view.
   gfx::Size GetMinimumSize();