Convert speech and session history browser_tests to run under content_browsertests.

content/test/content_browser_test.h

Index: content/test/content_browser_test.h
===================================================================
--- content/test/content_browser_test.h	(revision 148625)
+++ content/test/content_browser_test.h	(working copy)
@@ -12,6 +12,7 @@
 class GURL;
 
 namespace content {
+class ContentRendererClient;
 class Shell;
 class ShellMainDelegate;
 
@@ -41,6 +42,9 @@
   scoped_ptr<content::ShellMainDelegate> shell_main_delegate_;
 
   Shell* shell_;
+
+  // ContentRendererClient when running in single-process mode.
+  scoped_ptr<ContentRendererClient> single_process_renderer_client_;
 };
 
 }  // namespace content