Cleanup various clang warnings, use unique_ptrs in several places

Change-Id: I347904b25e51fcc7de14b1e72f1acd0f6ba26f3f
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 5cd5f69..0e54169 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -47,14 +47,13 @@
         , mOpaque(!translucent)
         , mCanvas(NULL)
         , mHaveNewSurface(false)
+        , mAnimationContext(contextFactory->createAnimationContext(mRenderThread.timeLord()))
         , mRootRenderNode(rootRenderNode) {
-    mAnimationContext = contextFactory->createAnimationContext(mRenderThread.timeLord());
     mRenderThread.renderState().registerCanvasContext(this);
 }
 
 CanvasContext::~CanvasContext() {
     destroy();
-    delete mAnimationContext;
     mRenderThread.renderState().unregisterCanvasContext(this);
 }