Add GetTimeTicksNow() to PlatformSupport.

mojo/edk/embedder/simple_platform_support.cc

Index: mojo/edk/embedder/simple_platform_support.cc
diff --git a/mojo/edk/embedder/simple_platform_support.cc b/mojo/edk/embedder/simple_platform_support.cc
index 4207120fc7b91601c743c85f22f81a89e53b36f2..f3143239b2a4f6de1e861a9ce247d5785f81f669 100644
--- a/mojo/edk/embedder/simple_platform_support.cc
+++ b/mojo/edk/embedder/simple_platform_support.cc
@@ -5,11 +5,16 @@
 #include "mojo/edk/embedder/simple_platform_support.h"
 
 #include "base/rand_util.h"
+#include "base/time/time.h"
 #include "mojo/edk/embedder/simple_platform_shared_buffer.h"
 
 namespace mojo {
 namespace embedder {
 
+MojoTimeTicks SimplePlatformSupport::GetTimeTicksNow() {
+  return base::TimeTicks::Now().ToInternalValue();
+}
+
 void SimplePlatformSupport::GetCryptoRandomBytes(void* bytes,
                                                  size_t num_bytes) {
   base::RandBytes(bytes, num_bytes);