Initial addition of Blimp engine crash client code (take 2)

blimp/engine/BUILD.gn

Index: blimp/engine/BUILD.gn
diff --git a/blimp/engine/BUILD.gn b/blimp/engine/BUILD.gn
index 21d95b00ff9a4f46be44b1f709cc20dc72c82d24..b018398d12cbd2bab419b22cbbd7c1e22708e8d0 100644
--- a/blimp/engine/BUILD.gn
+++ b/blimp/engine/BUILD.gn
@@ -74,6 +74,7 @@ source_set("app") {
     ":app_ui",
     ":blob_channel",
     ":common",
+    ":crash",
     ":renderer",
     ":session",
     "//base",
@@ -114,6 +115,23 @@ source_set("app_ui") {
   ]
 }
 
+source_set("crash") {
+  sources = [
+    "app/blimp_engine_crash_keys.cc",
+    "app/blimp_engine_crash_keys.h",
+    "app/blimp_engine_crash_reporter_client.cc",
+    "app/blimp_engine_crash_reporter_client.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/crash/content/app:app_breakpad_mac_win_to_be_deleted",
+    "//components/crash/core/common",
+    "//components/version_info",
+    "//content/public/common",
+  ]
+}
+
 source_set("common") {
   sources = [
     "common/blimp_browser_context.cc",