Define crash keys in the directory hierarchy where they are used.

content/public/common/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
 import("//content/common/common.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/webrtc/build/webrtc.gni")
@@ skipping 59 matching lines @@
     "content_switches.h",
   ]
   sources = [
     "//content/common/content_export.h",
     "content_switches.cc",
   ]
 
   public_configs = [ ":static_switches_defines" ]
 }
 
+# This target allows you to use the crash_keys constants (and registration
+# function) without depending on the rest of content.
+source_set("crash_keys") {
+  public = [
+    "crash_keys.h",
+  ]
+  sources = [
+    "//content/common/content_export.h",
+    "crash_keys.cc",
+  ]
+  deps = [
+    "//base",
+    "//components/crash/core/common",
+  ]
+
+  public_configs = [ "//content:content_implementation" ]
+}
+
 source_set("common_sources") {
   # External code should depend on via ":common" above.
   visibility = [ "//content/*" ]
 
   sources = rebase_path(content_common_gypi_values.public_common_sources,
                         ".",
                         "//content")
 
   configs += [
     "//build/config:precompiled_headers",
     "//content:content_implementation",
   ]
 
   public_configs = [ "//v8:external_startup_data" ]
 
   public_deps = [
     "//content/common",
     "//mojo/public/cpp/bindings",
     "//services/shell/public/interfaces",
     "//third_party/WebKit/public:blink_headers",
     "//ui/accessibility",
     "//url/ipc:url_ipc",
   ]
   deps = [
+    "//components/crash/core/common",
     "//ipc",
     "//media",
     "//mojo/common",
     "//net",
     "//ppapi/c",
     "//services/shell/public/cpp",
     "//skia",
     "//storage/common",
     "//third_party/icu",
     "//ui/accessibility",
@@ skipping 32 matching lines @@
 source_set("feature_h264_with_openh264_ffmpeg") {
   deps = [
     ":features",
     "//base",
   ]
   sources = [
     "feature_h264_with_openh264_ffmpeg.cc",
     "feature_h264_with_openh264_ffmpeg.h",
   ]
 }