Initial attempt at jank-tracking stat collection

Is a bit naive, perhaps overly aggressive, but sorta works

Change-Id: I01a774e00dbe681439c02557d9728ae43c45ce50
diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index d3fbde8..9a60dc7 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -17,7 +17,14 @@
 #ifndef CANVASCONTEXT_H_
 #define CANVASCONTEXT_H_
 
-#include <set>
+#include "DamageAccumulator.h"
+#include "DrawProfiler.h"
+#include "IContextFactory.h"
+#include "FrameInfo.h"
+#include "RenderNode.h"
+#include "utils/RingBuffer.h"
+#include "renderthread/RenderTask.h"
+#include "renderthread/RenderThread.h"
 
 #include <cutils/compiler.h>
 #include <EGL/egl.h>
@@ -25,14 +32,7 @@
 #include <utils/Functor.h>
 #include <utils/Vector.h>
 
-#include "../DamageAccumulator.h"
-#include "../DrawProfiler.h"
-#include "../IContextFactory.h"
-#include "../RenderNode.h"
-#include "RenderTask.h"
-#include "RenderThread.h"
-
-#define FUNCTOR_PROCESS_DELAY 4
+#include <set>
 
 namespace android {
 namespace uirenderer {
@@ -75,7 +75,7 @@
     void setOpaque(bool opaque);
     void makeCurrent();
     void processLayerUpdate(DeferredLayerUpdater* layerUpdater);
-    void prepareTree(TreeInfo& info);
+    void prepareTree(TreeInfo& info, int64_t* uiFrameInfo);
     void draw();
     void destroy();
 
@@ -103,6 +103,9 @@
 
     DrawProfiler& profiler() { return mProfiler; }
 
+    void dumpFrames(int fd);
+    void resetFrameStats();
+
 private:
     friend class RegisterFrameCallbackTask;
     // TODO: Replace with something better for layer & other GL object
@@ -133,6 +136,9 @@
     const sp<RenderNode> mRootRenderNode;
 
     DrawProfiler mProfiler;
+    FrameInfo* mCurrentFrameInfo;
+    // Ring buffer large enough for 1 second worth of frames
+    RingBuffer<FrameInfo, 60> mFrames;
 
     std::set<RenderNode*> mPrefetechedLayers;
 };