Added the Vulkan Context Provider implementation.

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index f1f2ced74482abe816e767196861abf9722761bd..9d41daca26450c5b3e8e58c93885ae012357b753 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -185,6 +185,10 @@
 #include "ui/views/mus/window_manager_connection.h"
 #endif
 
+#if defined(ENABLE_VULKAN)
+#include "gpu/vulkan/vulkan_implementation.h"
+#endif
+
 // One of the linux specific headers defines this as a macro.
 #ifdef DestroyAll
 #undef DestroyAll
@@ -1214,6 +1218,13 @@ int BrowserMainLoop::BrowserThreadsStarted() {
 #endif  // defined(USE_AURA)
 #endif  // defined(OS_ANDROID)
 
+#if defined(ENABLE_VULKAN)
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableVulkan)) {
+    gpu::InitializeVulkan();
+  }
+#endif

[piman, 2016/04/19 23:42:02]

nit: move to before ImageTransportFactory::Initialize() (around l.1194), in case
GpuProcessTransportFactory wants to initialize some Vulkan things early, later.

[David Yen, 2016/04/20 17:37:38]

Done.

+
   // Enable the GpuMemoryBuffer dump provider with IO thread affinity. Note that
   // unregistration happens on the IO thread (See
   // BrowserProcessSubThread::IOThreadPreCleanUp).