[Mac]: Enable speech sub-menu under the edit menu and pipe it through to the renderer.

content/browser/renderer_host/test_render_view_host.cc

Index: content/browser/renderer_host/test_render_view_host.cc
===================================================================
--- content/browser/renderer_host/test_render_view_host.cc	(revision 149502)
+++ content/browser/renderer_host/test_render_view_host.cc	(working copy)
@@ -137,6 +137,20 @@
   // <viettrungluu@gmail.com>: Do I need to do anything here?
 }
 
+bool TestRenderWidgetHostView::SupportsSpeech() const {
+  return false;
+}
+
+void TestRenderWidgetHostView::SpeakSelection() {
+}
+
+bool TestRenderWidgetHostView::IsSpeaking() const {
+  return false;
+}
+
+void TestRenderWidgetHostView::StopSpeaking() {
+}
+
 void TestRenderWidgetHostView::PluginFocusChanged(bool focused,
                                                   int plugin_id) {
 }