More accurate render time and continuous fresh

tools/viewer/sk_app/android/main_android.cpp

Index: tools/viewer/sk_app/android/main_android.cpp
diff --git a/tools/viewer/sk_app/android/main_android.cpp b/tools/viewer/sk_app/android/main_android.cpp
index 9334f0ccd3bc4fff068b2d40e0868d36bdacd7e6..ee2dab570df62a5af8d854baf40be4848433060b 100644
--- a/tools/viewer/sk_app/android/main_android.cpp
+++ b/tools/viewer/sk_app/android/main_android.cpp
@@ -13,8 +13,6 @@
 #include "../Application.h"
 #include "Timer.h"
 
-static double now_ms() { return SkTime::GetNSecs() * 1e-6; }
-
 using sk_app::Application;
 
 /**
@@ -36,9 +34,6 @@ void android_main(struct android_app* state) {
                                                            const_cast<char**>(gCmdLine),
                                                            state));
 
-    double currentTime = 0.0;
-    double previousTime = 0.0;
-
     // loop waiting for stuff to do.
     while (1) {
         // Read all pending events.
@@ -60,9 +55,7 @@ void android_main(struct android_app* state) {
                 return;
             }
 
-            previousTime = currentTime;
-            currentTime = now_ms();
-            vkApp->onIdle(currentTime - previousTime);
+            vkApp->onIdle();
         }
     }
 }