add SkAnimTimer, SPACE = pause/resume, ESP = stop

samplecode/SampleCamera.cpp

Index: samplecode/SampleCamera.cpp
diff --git a/samplecode/SampleCamera.cpp b/samplecode/SampleCamera.cpp
index 35fa719479424a7891312206279586e148a561b8..af9dbe8d653012070241b2d271e4dc3d29d6452f 100644
--- a/samplecode/SampleCamera.cpp
+++ b/samplecode/SampleCamera.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "SampleCode.h"
+#include "SkAnimTimer.h"
 #include "SkView.h"
 #include "SkCanvas.h"
 #include "SkCamera.h"
@@ -88,10 +89,11 @@ protected:
         }
     }
 
-    bool onAnimatePulse(SkMSec curr, SkMSec prev) SK_OVERRIDE {
-        fRY += (curr - prev) * 0.09f;
-        if (fRY >= 360) {
+    bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE {
+        if (timer.isStopped()) {
             fRY = 0;
+        } else {
+            fRY = timer.scaled(90, 360);
         }
         return true;
     }