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 f05b7b3099d83aa96a1bdf60abda347a7b8f3bed..1310cbb215010177264e4021f5445e6ea68fe4b8 100644
--- a/chrome/browser/ui/views/frame/browser_view_layout.h
+++ b/chrome/browser/ui/views/frame/browser_view_layout.h
@@ -21,7 +21,6 @@ class InfoBarContainerView;
 class TabContentsContainer;
 class TabStrip;
 class ToolbarView;
-class WebContentsModalDialogHost;
 
 namespace gfx {
 class Point;
@@ -32,6 +31,10 @@ namespace views {
 class SingleSplitView;
 }
 
+namespace web_modal {
+class WebContentsModalDialogHost;
+}
+
 // The layout manager used in chrome browser.
 class BrowserViewLayout : public views::LayoutManager {
  public:
@@ -56,7 +59,7 @@ 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();