Factor out content shell and tests into a standalone gyp

content/content_shell.gypi

Index: content/content_shell.gypi
diff --git a/content/content_shell.gypi b/content/content_shell.gypi
index d4a66e0140979cb48b641297e8735f38e1b6edb2..3eea9f00662e68387114f07a40d35b59e3fa65b8 100644
--- a/content/content_shell.gypi
+++ b/content/content_shell.gypi
@@ -27,18 +27,18 @@
         'chromium_code': 1,
       },
       'dependencies': [
-        'content_app',
-        'content_browser',
-        'content_common',
-        'content_gpu',
-        'content_plugin',
-        'content_ppapi_plugin',
-        'content_renderer',
+        'content.gyp:content_app',
+        'content.gyp:content_browser',
+        'content.gyp:content_common',
+        'content.gyp:content_gpu',
+        'content.gyp:content_plugin',
+        'content.gyp:content_ppapi_plugin',
+        'content.gyp:content_renderer',
+        'content.gyp:content_utility',
+        'content.gyp:content_worker',
+        'content_resources.gyp:content_resources',
         'content_shell_resources',
-        'content_utility',
-        'content_worker',
         'test_support_content',
-        'content_resources.gyp:content_resources',
         '../base/base.gyp:base',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../ipc/ipc.gyp:ipc',
@@ -664,7 +664,7 @@
           'target_name': 'content_shell_java',
           'type': 'none',
           'dependencies': [
-            'content_java',
+            'content.gyp:content_java',
           ],
           'variables': {
             'java_in_dir': '../content/shell/android/java',
@@ -691,7 +691,7 @@
           'target_name': 'content_shell_apk',
           'type': 'none',
           'dependencies': [
-            'content_java',
+            'content.gyp:content_java',
             'content_java_test_support',
             'content_shell_java',
             'libcontent_shell_content_view',