Add an IPC method for Blink to call RapporService::RecordSample()

components/rappor/rappor_content.gyp

Index: components/rappor/rappor_content.gyp
diff --git a/chrome/chrome_child.gypi b/components/rappor/rappor_content.gyp
similarity index 50%
copy from chrome/chrome_child.gypi
copy to components/rappor/rappor_content.gyp
index 6464a39177c64ad13a749213165e50411d73d455..30bd8b81ec34873cbf08d93f95d1f96a7b0aa9d5 100644
--- a/chrome/chrome_child.gypi
+++ b/components/rappor/rappor_content.gyp
@@ -5,19 +5,16 @@
 {
   'targets': [
     {
-      'target_name': 'child',
+      # GN verison: //components/rappor/content/common
+      'target_name': 'rappor_content_common',
       'type': 'static_library',
-      'variables': { 'enable_wexit_time_destructors': 1, },
       'dependencies': [
-        '../base/base.gyp:base',
-        '../content/content.gyp:content_child',
-      ],
-      'include_dirs': [
-        '..',
+        '../../base/base.gyp:base',
+        '../../ipc/ipc.gyp:ipc',
       ],
       'sources': [
-        'child/pdf_child_init.cc',
-        'child/pdf_child_init.h',
+        'content/common/rappor_messages.cc',
+        'content/common/rappor_messages.h',
       ],
     },
   ],