Initial addition of blimp crash client code.

blimp/engine/BUILD.gn

Index: blimp/engine/BUILD.gn
diff --git a/blimp/engine/BUILD.gn b/blimp/engine/BUILD.gn
index a19eb10b6df1bf0507bd5709567f72360961e874..b712d661f4809a81b83130a641816543f3622bb1 100644
--- a/blimp/engine/BUILD.gn
+++ b/blimp/engine/BUILD.gn
@@ -69,6 +69,7 @@ source_set("app") {
   deps = [
     ":app_ui",
     ":common",
+    ":crash",
     ":session",
     "//base",
     "//blimp/common/proto",
@@ -108,6 +109,23 @@ 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",