Partially componentize chrome/common/crash_keys.

components/crash_keys.gypi

Index: components/crash_keys.gypi
diff --git a/components/toolbar.gypi b/components/crash_keys.gypi
similarity index 55%
copy from components/toolbar.gypi
copy to components/crash_keys.gypi
index 77dc03909b459acaa06f46cf338bb82c19ab881f..5baf2eb46eb967513e578c7cff222905774ffce8 100644
--- a/components/toolbar.gypi
+++ b/components/crash_keys.gypi
@@ -5,20 +5,20 @@
 {
   'targets': [
     {
-      # GN version: //components/toolbar
-      'target_name': 'toolbar',
+      # GN version: //components/crash_keys
+      'target_name': 'crash_keys',
       'type': 'static_library',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../url/url.gyp:url_lib',
-      ],
       'include_dirs': [
         '..',
       ],
+      'dependencies': [
+        # List of dependencies is intentionally very minimal. Please avoid
+        # adding extra dependencies without first checking with OWNERS.
+        '../base/base.gyp:base',
+      ],
       'sources': [
-        # Note: sources list duplicated in GN build.
-        'toolbar/toolbar_model.cc',
-        'toolbar/toolbar_model.h',
+        'crash_keys/crash_keys.cc',
+        'crash_keys/crash_keys.h',
       ],
     },
   ],