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 edadc181b79f064b4e61b5ddca3e0c6a640b945a..a082aa7a789b12ac02a8b5f1caae7781997c0ec3 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -2781,18 +2781,8 @@ void ChromeContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
   fd = ui::GetLocalePackFd(&(*regions)[kAndroidLocalePakDescriptor]);
   mappings->Share(kAndroidLocalePakDescriptor, fd);
 
-  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);