Move non-browser specific ScreenshotTaker code to ui/snapshot.

components/components_tests.gyp

Index: components/components_tests.gyp
diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index 76b656a94158a6431e2f48480bb008e496294341..d8367e7943a56a57c17a6877cea043ed8c9ef228 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -468,6 +468,15 @@
             'components.gyp:variations_http_provider',
           ],
           'conditions': [
+            ['use_aura == 1', {
+              'sources': [
+                'screenshot_taker/screenshot_taker_unittest.cc',
+              ],
+              'dependencies': [
+                '<(DEPTH)/ui/aura/aura.gyp:aura_test_support',
+                'components.gyp:screenshot_taker',
+              ],
+            }],
             ['toolkit_views == 1', {
               'sources': [
                 'bookmarks/browser/bookmark_node_data_unittest.cc',