Set temporary paths volatile so we don't cache them.

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 83cdef701a077f71614feb6f202a327d75fdb810..321c96e0b18a81e96916ee471e440431cc1a1eca 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -706,6 +706,7 @@ void SkGpuDevice::drawPath(const SkDraw& draw, const SkPath& origSrcPath,
 
         if (!pathIsMutable) {
             result = tmpPath.init();
+            result->setIsVolatile(true);
             pathIsMutable = true;
         }
         // should I push prePathMatrix on our MV stack temporarily, instead
@@ -740,6 +741,9 @@ void SkGpuDevice::drawPath(const SkDraw& draw, const SkPath& origSrcPath,
 
         // avoid possibly allocating a new path in transform if we can
         SkPath* devPathPtr = pathIsMutable ? pathPtr : tmpPath.init();
+        if (pathIsMutable) {

[bsalomon, 2014/10/23 17:54:09]

Maybe we should avoid this early transformation to device space since we lose
the original path's gen ID.

[jvanverth1, 2014/10/23 20:06:18]

Filed as Issue 3056

+            devPathPtr->setIsVolatile(true);
+        }
 
         // transform the path into device space
         pathPtr->transform(fContext->getMatrix(), devPathPtr);