Use a mocked compositor for unit tests

chrome/test/base/in_process_browser_test.cc

Index: chrome/test/base/in_process_browser_test.cc
diff --git a/chrome/test/base/in_process_browser_test.cc b/chrome/test/base/in_process_browser_test.cc
index b351355fafbc7dc76dcb3304f373f1195fff8bcb..822e959e6c6778dc5d07926e9fdbe8f8e166b345 100644
--- a/chrome/test/base/in_process_browser_test.cc
+++ b/chrome/test/base/in_process_browser_test.cc
@@ -36,6 +36,12 @@
 #include "content/renderer/mock_content_renderer_client.h"
 #include "net/base/mock_host_resolver.h"
 #include "net/test/test_server.h"
+#include "ui/gfx/gl/gl_switches.h"
+
+#if defined(VIEWS_COMPOSITOR)
+#include "ui/gfx/compositor/test_compositor.h"
+#include "views/widget/widget.h"
+#endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/audio_handler.h"
@@ -44,6 +50,12 @@
 // Passed as value of kTestType.
 static const char kBrowserTestType[] = "browser";
 
+#if defined(VIEWS_COMPOSITOR)
+static ui::Compositor* TestCreateCompositor(ui::CompositorDelegate* owner) {
+  return new ui::TestCompositor(owner);
+}
+#endif
+
 InProcessBrowserTest::InProcessBrowserTest()
     : browser_(NULL),
       show_window_(false),
@@ -128,6 +140,17 @@ void InProcessBrowserTest::PrepareTestCommandLine(CommandLine* command_line) {
   // Propagate commandline settings from test_launcher_utils.
   test_launcher_utils::PrepareBrowserCommandLineForTests(command_line);
 
+  // Use MesaGL as the GL implementation, as desktopgl/egl is not present on
+  // test bots yet.
+  EXPECT_TRUE(
+      test_launcher_utils::OverrideGLImplementation(

[Paweł Hajdan Jr., 2011/10/13 20:08:13]

Do you also want things to apply to content? If so, you should probably use
BrowserTestBase.

[danakj, 2011/10/14 15:15:13]

Yes I should, thanks !

+          command_line, gfx::kGLImplementationOSMesaName));
+
+#if defined(VIEWS_COMPOSITOR)
+  // Use a mock compositor that noops draws.
+  views::Widget::set_compositor_factory_for_testing(&TestCreateCompositor);
+#endif
+
   if (dom_automation_enabled_)
     command_line->AppendSwitch(switches::kDomAutomationController);