Refactor CrashDump*Manager to use a shared CrashDumpObserver.

content/shell/browser/shell_browser_main_parts.h

Index: content/shell/browser/shell_browser_main_parts.h
diff --git a/content/shell/browser/shell_browser_main_parts.h b/content/shell/browser/shell_browser_main_parts.h
index a11e961d7ff03f449c97a2d3e193056c81a63472..44ad24046d31fc399deece41097e4791995bb179 100644
--- a/content/shell/browser/shell_browser_main_parts.h
+++ b/content/shell/browser/shell_browser_main_parts.h
@@ -13,16 +13,16 @@
 #include "content/public/common/main_function_params.h"
 #include "content/shell/browser/shell_browser_context.h"
 
+namespace base {
+class Thread;
+}
+
 #if defined(OS_ANDROID)
 namespace breakpad {
 class CrashDumpManager;
 }
 #endif
 
-namespace base {
-class Thread;
-}
-
 namespace devtools_http_handler {
 class DevToolsHttpHandler;
 }
@@ -73,9 +73,6 @@ class ShellBrowserMainParts : public BrowserMainParts {
   }
 
  private:
-#if defined(OS_ANDROID)
-  std::unique_ptr<breakpad::CrashDumpManager> crash_dump_manager_;
-#endif
   std::unique_ptr<net::NetLog> net_log_;
   std::unique_ptr<ShellBrowserContext> browser_context_;
   std::unique_ptr<ShellBrowserContext> off_the_record_browser_context_;
@@ -87,6 +84,10 @@ class ShellBrowserMainParts : public BrowserMainParts {
   std::unique_ptr<devtools_http_handler::DevToolsHttpHandler>
       devtools_http_handler_;
 
+#if defined(OS_ANDROID)
+  std::unique_ptr<breakpad::CrashDumpManager> crash_dump_manager_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserMainParts);
 };