Mouse lock implementation, including the renderer side and the Windows version of the browser side.

content/browser/renderer_host/test_render_view_host.cc

Index: content/browser/renderer_host/test_render_view_host.cc
diff --git a/content/browser/renderer_host/test_render_view_host.cc b/content/browser/renderer_host/test_render_view_host.cc
index 9303f86e8e70beb600af4b3bc255224dc2b885fb..e15018eebabf7db2a341052e08b5b4d40b132f61 100644
--- a/content/browser/renderer_host/test_render_view_host.cc
+++ b/content/browser/renderer_host/test_render_view_host.cc
@@ -252,6 +252,13 @@ gfx::PluginWindowHandle TestRenderWidgetHostView::GetCompositingSurface() {
   return gfx::kNullPluginWindow;
 }
 
+bool TestRenderWidgetHostView::LockMouse() {
+  return false;
+}
+
+void TestRenderWidgetHostView::UnlockMouse() {
+}
+
 TestRenderViewHostFactory::TestRenderViewHostFactory(
     RenderProcessHostFactory* rph_factory)
     : render_process_host_factory_(rph_factory) {