Update to Chromium revision 6e53600d (#386251)

- Remove |accept_lang| parameter from CefJSDialogHandler::OnJSDialog
  and CefFormatUrlForSecurityDisplay (see https://crbug.com/336973#c36).
- Remove remaining NPAPI-related code including functions from
  cef_web_plugin.h (see https://crbug.com/493212#c55).
- Mac: 10.7+ deployment target is now required for client applications.
- Mac: Remove CefBrowserHost::SetWindowVisibility (issue #1375). No
  replacement is required for windowed rendering. Use WasHidden for
  off-screen rendering.
- Windows: Visual Studio 2015 Update 2 is now required when building
  CEF/Chromium.

libcef/common/crash_reporter_client.cc

@@ -12,6 +12,7 @@
 #include "base/strings/string16.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/public/common/content_switches.h"
 
 CefCrashReporterClient::CefCrashReporterClient() {}
 CefCrashReporterClient::~CefCrashReporterClient() {}
@@ -56,3 +57,11 @@ bool CefCrashReporterClient::GetCrashDumpLocation(base::FilePath* crash_dir) {
   return false;
 #endif
 }
+
+bool CefCrashReporterClient::EnableBreakpadForProcess(
+    const std::string& process_type) {
+  return process_type == switches::kRendererProcess ||
+         process_type == switches::kPpapiPluginProcess ||
+         process_type == switches::kZygoteProcess ||
+         process_type == switches::kGpuProcess;
+}