Stop building DumpRenderTree and delete the files.

Tools/DumpRenderTree/DumpRenderTree.gypi

Index: Tools/DumpRenderTree/DumpRenderTree.gypi
diff --git a/Tools/DumpRenderTree/DumpRenderTree.gypi b/Tools/DumpRenderTree/DumpRenderTree.gypi
index 5eaa241b14e6c7c39f522197ec1a75b683a00f1d..ec7292cb75535ce822929487a788066a834b2567 100644
--- a/Tools/DumpRenderTree/DumpRenderTree.gypi
+++ b/Tools/DumpRenderTree/DumpRenderTree.gypi
@@ -1,34 +1,5 @@
 {
     'variables': {
-        'drt_files': [
-            'DumpRenderTree.h',
-            'DumpRenderTreeCommon.cpp',
-            'chromium/DRTDevToolsAgent.cpp',
-            'chromium/DRTDevToolsAgent.h',
-            'chromium/DRTDevToolsClient.cpp',
-            'chromium/DRTDevToolsClient.h',
-            'chromium/DumpRenderTree.cpp',
-            'chromium/MockPlatform.cpp',
-            'chromium/MockPlatform.h',
-            'chromium/MockWebPrerenderingSupport.cpp',
-            'chromium/MockWebPrerenderingSupport.h',
-            'chromium/Task.h',
-            'chromium/Task.cpp',
-            'chromium/TestEventPrinter.h',
-            'chromium/TestEventPrinter.cpp',
-            'chromium/TestNavigationController.cpp',
-            'chromium/TestNavigationController.h',
-            'chromium/TestShell.cpp',
-            'chromium/TestShell.h',
-            'chromium/TestShellAndroid.cpp',
-            'chromium/TestShellMac.mm',
-            'chromium/TestShellPosix.cpp',
-            'chromium/TestShellStub.cpp',
-            'chromium/TestShellWin.cpp',
-            'chromium/TestShellX11.cpp',
-            'chromium/WebViewHost.cpp',
-            'chromium/WebViewHost.h',
-        ],
         'test_runner_files': [
             'chromium/TestRunner/public/WebTestDelegate.h',
             'chromium/TestRunner/public/WebPreferences.h',