Convert utility process extension Unpacker IPC to mojo

chrome/utility/extensions/extensions_handler.cc

Index: chrome/utility/extensions/extensions_handler.cc
diff --git a/chrome/utility/extensions/extensions_handler.cc b/chrome/utility/extensions/extensions_handler.cc
index 4cb3fa887f6fb7d0f8fe385a489573f8e18e2c53..5c939702c3324759f74d2d3aa2a16919edd526c8 100644
--- a/chrome/utility/extensions/extensions_handler.cc
+++ b/chrome/utility/extensions/extensions_handler.cc
@@ -176,8 +176,7 @@ ExtensionsHandler::ExtensionsHandler() {
   ExtensionsClient::Set(ChromeExtensionsClient::GetInstance());
 }
 
-ExtensionsHandler::~ExtensionsHandler() {
-}
+ExtensionsHandler::~ExtensionsHandler() = default;

[Devlin, 2017/03/08 16:22:24]

nit: I'd slightly prefer to avoid making stylistic changes that are orthogonal
to the patch, but don't feel strongly.

[Noel Gordon, 2017/03/08 17:56:09]

Don't feel strongly about this type of change so much, but in general, my view
is orthogonal changes are orthogonal and imho, best dealt with in follow-up bugs
(eg., the bug I filed about original_manifest). 

 
 // static
 void ExtensionsHandler::PreSandboxStartup() {