Update Mac plugin IME handling to match updated spec

chrome/browser/renderer_host/test/test_render_view_host.cc

Index: chrome/browser/renderer_host/test/test_render_view_host.cc
diff --git a/chrome/browser/renderer_host/test/test_render_view_host.cc b/chrome/browser/renderer_host/test/test_render_view_host.cc
index 1c2e4b415256bfeb9bba1b9f1089b4936de96ad1..41417069d24c6f58396580808c604640e9b60470 100644
--- a/chrome/browser/renderer_host/test/test_render_view_host.cc
+++ b/chrome/browser/renderer_host/test/test_render_view_host.cc
@@ -143,8 +143,11 @@ void TestRenderWidgetHostView::SetActive(bool active) {
   // <viettrungluu@gmail.com>: Do I need to do anything here?
 }
 
-void TestRenderWidgetHostView::SetPluginImeEnabled(bool enabled,
-                                                   int plugin_id) {
+void TestRenderWidgetHostView::PluginFocusChanged(bool focused,
+                                                  int plugin_id) {
+}
+
+void TestRenderWidgetHostView::StartPluginIme() {
 }
 
 bool TestRenderWidgetHostView::PostProcessEventForPluginIme(