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 82c986ba706a5befa2c22cee5f9f8341d3d3312a..fd355dbc3802d419d623ea7689b8d9a1593a51e6 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -2820,18 +2820,8 @@ void ChromeContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
   fd = ui::GetLocalePackFd(&region);
   mappings->ShareWithRegion(kAndroidLocalePakDescriptor, fd, region);
 
-  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.";
-    }
-  }
+  breakpad::CrashDumpObserver::GetInstance()->BrowserChildProcessStarted(
+      child_process_id, mappings);
 
   base::FilePath app_data_path;
   PathService::Get(base::DIR_ANDROID_APP_DATA, &app_data_path);