Support sharing of ContentMain and BrowserMain code with embedded use cases.

content/shell/shell_content_browser_client.h

Index: content/shell/shell_content_browser_client.h
===================================================================
--- content/shell/shell_content_browser_client.h	(revision 117304)
+++ content/shell/shell_content_browser_client.h	(working copy)
@@ -16,6 +16,8 @@
 #include "content/browser/tab_contents/tab_contents_view_win_delegate.h"
 #endif
 
+class ShellMainDelegate;
+
 namespace content {
 
 class ShellBrowserMainParts;
@@ -26,7 +28,7 @@
 #endif
 {
  public:
-  ShellContentBrowserClient();
+  ShellContentBrowserClient(ShellMainDelegate* delegate);
   virtual ~ShellContentBrowserClient();
 
   void set_shell_browser_main_parts(ShellBrowserMainParts* parts) {
@@ -179,6 +181,9 @@
 #endif
 
  private:
+  // The delegate will always outlive this class.
+  ShellMainDelegate* delegate_;
+
   ShellBrowserMainParts* shell_browser_main_parts_;
 };