Adds views::corewm::WMState to install common state

ui/views/examples/content_client/examples_browser_main_parts.cc

Index: ui/views/examples/content_client/examples_browser_main_parts.cc
diff --git a/ui/views/examples/content_client/examples_browser_main_parts.cc b/ui/views/examples/content_client/examples_browser_main_parts.cc
index e270d6fef123d7b987909680eb7db64f8fe7b13c..1cbee03993b974bfc5bd3e7c68062c2948126a96 100644
--- a/ui/views/examples/content_client/examples_browser_main_parts.cc
+++ b/ui/views/examples/content_client/examples_browser_main_parts.cc
@@ -22,6 +22,7 @@
 #if defined(USE_AURA)
 #include "ui/aura/env.h"
 #include "ui/gfx/screen.h"
+#include "ui/views/corewm/wm_state.h"
 #include "ui/views/widget/desktop_aura/desktop_screen.h"
 #include "ui/views/widget/native_widget_aura.h"
 #endif
@@ -43,6 +44,12 @@ ExamplesBrowserMainParts::ExamplesBrowserMainParts(
 ExamplesBrowserMainParts::~ExamplesBrowserMainParts() {
 }
 
+void ExamplesBrowserMainParts::ToolkitInitialized() {
+#if defined(USE_AURA)
+  wm_state_.reset(new views::corewm::WMState);
+#endif
+}
+
 void ExamplesBrowserMainParts::PreMainMessageLoopRun() {
   ui::InitializeInputMethodForTesting();
   browser_context_.reset(new content::ShellBrowserContext(false, NULL));