diff -up chromium-54.0.2840.100/gpu/command_buffer/client/shared_memory_limits.h.constexpr chromium-54.0.2840.100/gpu/command_buffer/client/shared_memory_limits.h
--- chromium-54.0.2840.100/gpu/command_buffer/client/shared_memory_limits.h.constexpr	2016-11-10 21:02:15.000000000 +0100
+++ chromium-54.0.2840.100/gpu/command_buffer/client/shared_memory_limits.h	2016-11-14 20:17:43.820000000 +0100
@@ -10,7 +10,7 @@
 namespace gpu {
 
 struct SharedMemoryLimits {
-  SharedMemoryLimits() = default;
+//  SharedMemoryLimits() = default;
 
   int32_t command_buffer_size = 1024 * 1024;
   uint32_t start_transfer_buffer_size = 1 * 1024 * 1024;
@@ -19,6 +19,8 @@ struct SharedMemoryLimits {
 
   static constexpr uint32_t kNoLimit = 0;
   uint32_t mapped_memory_reclaim_limit = kNoLimit;
+  
+  constexpr SharedMemoryLimits() {}
 
   // These are limits for contexts only used for creating textures, mailboxing
   // them and dealing with synchronization.
--- chromium-54.0.2840.100/chrome/common/extensions/chrome_extensions_client.cc.constexpr	2016-11-10 21:02:11.000000000 +0100
+++ chromium-54.0.2840.100/chrome/common/extensions/chrome_extensions_client.cc	2016-11-14 21:39:18.680000000 +0100
@@ -103,7 +103,7 @@
 static base::LazyInstance<ChromeExtensionsClient> g_client =
     LAZY_INSTANCE_INITIALIZER;
 
-ChromeExtensionsClient::ChromeExtensionsClient() {}
+ChromeExtensionsClient::ChromeExtensionsClient() : chrome_api_permissions_(), extensions_api_permissions_() {}
 
 ChromeExtensionsClient::~ChromeExtensionsClient() {
 }