Revert "Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton."

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 1e98c971f84eccd44dea1102742d98f9d6fe3713..c5dfbf0d6ba2ca4b78a2e525feafb33a15af7661 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -2719,8 +2719,18 @@ void ChromeContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
   fd = ui::GetLocalePackFd(&(*regions)[kAndroidLocalePakDescriptor]);
   mappings->Share(kAndroidLocalePakDescriptor, fd);
 
-  breakpad::CrashDumpObserver::GetInstance()->BrowserChildProcessStarted(
-      child_process_id, mappings);
+  if (breakpad::IsCrashReporterEnabled()) {
+    base::File file =
+        breakpad::CrashDumpManager::GetInstance()->CreateMinidumpFile(
+            child_process_id);
+    if (file.IsValid()) {
+      mappings->Transfer(kAndroidMinidumpDescriptor,
+                         base::ScopedFD(file.TakePlatformFile()));
+    } else {
+      LOG(ERROR) << "Failed to create file for minidump, crash reporting will "
+                 "be disabled for this process.";
+    }
+  }
 
   base::FilePath app_data_path;
   PathService::Get(base::DIR_ANDROID_APP_DATA, &app_data_path);