Revert of Move the user agent styles sheets to blink_resources.grd (Part 3)

Source/core/core_generated.gyp

Index: Source/core/core_generated.gyp
diff --git a/Source/core/core_generated.gyp b/Source/core/core_generated.gyp
index c8f042c5b42ad7a38a0691b23eb45aba3acccd2e..d040e9f0613170fb83090632624af64a16e5a25d 100644
--- a/Source/core/core_generated.gyp
+++ b/Source/core/core_generated.gyp
@@ -550,6 +550,52 @@
           ],
         },
         {
+          'action_name': 'UserAgentStyleSheets',
+          'variables': {
+            'scripts': [
+              '../build/scripts/make-file-arrays.py',
+            ],
+            'stylesheets': [
+              'css/html.css',
+              'css/quirks.css',
+              'css/view-source.css',
+              'css/themeChromium.css',
+              'css/themeChromiumAndroid.css',
+              'css/themeChromiumLinux.css',
+              'css/themeChromiumSkia.css',
+              'css/themeInputMultipleFields.css',
+              'css/themeMac.css',
+              'css/themeWin.css',
+              'css/themeWinQuirks.css',
+              'css/svg.css',
+              'css/navigationTransitions.css',
+              'css/mathml.css',
+              'css/mediaControls.css',
+              'css/mediaControlsAndroid.css',
+              'css/fullscreen.css',
+              'css/xhtmlmp.css',
+              'css/viewportAndroid.css',
+            ],
+          },
+          'inputs': [
+            '<@(scripts)',
+            '<@(stylesheets)'
+          ],
+          'outputs': [
+            '<(blink_core_output_dir)/UserAgentStyleSheets.h',
+            '<(blink_core_output_dir)/UserAgentStyleSheetsData.cpp',
+          ],
+          'action': [
+            'python',
+            '<@(scripts)',
+            '--namespace',
+            'blink',
+            '--out-h=<(blink_core_output_dir)/UserAgentStyleSheets.h',
+            '--out-cpp=<(blink_core_output_dir)/UserAgentStyleSheetsData.cpp',
+            '<@(stylesheets)',
+          ],
+        },
+        {
           'action_name': 'FetchInitiatorTypeNames',
           'inputs': [
             '<@(make_names_files)',