Add flag to communicate last casted app to renderer process

chromecast/crash/android/cast_crash_reporter_client_android.cc

Index: chromecast/crash/android/cast_crash_reporter_client_android.cc
diff --git a/chromecast/crash/android/cast_crash_reporter_client_android.cc b/chromecast/crash/android/cast_crash_reporter_client_android.cc
index 41717f892f8addde369c70fc0e0f8cb04b330ebf..134b07309ceb6fa44675a4d61a399aec7179409b 100644
--- a/chromecast/crash/android/cast_crash_reporter_client_android.cc
+++ b/chromecast/crash/android/cast_crash_reporter_client_android.cc
@@ -5,10 +5,12 @@
 #include "chromecast/crash/android/cast_crash_reporter_client_android.h"
 
 #include "base/base_paths.h"
+#include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "chromecast/android/chromecast_config_android.h"
+#include "chromecast/common/chromecast_switches.h"
 #include "chromecast/common/global_descriptors.h"
 #include "chromecast/common/version.h"
 #include "chromecast/crash/cast_crash_keys.h"
@@ -74,4 +76,20 @@ bool CastCrashReporterClientAndroid::EnableBreakpadForProcess(
          process_type == switches::kGpuProcess;
 }
 
+bool CastCrashReporterClientAndroid::HandleCrashDump(
+    const char* crashdump_filename) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (command_line->GetSwitchValueNative(switches::kProcessType) ==
+      switches::kRendererProcess) {
+    std::string last_launched_app =
+        command_line->GetSwitchValueNative(switches::kLastLaunchedAppId);
+    if (!last_launched_app.empty())
+      base::debug::SetCrashKeyValue(crash_keys::kLastApp, last_launched_app);
+  }
+
+  // Now that we've registered crash metadata, return false to use default
+  // breakpad dump writer
+  return false;
+}
+
 }  // namespace chromecast