Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/audio/FFTFrame.h

Index: third_party/WebKit/Source/platform/audio/FFTFrame.h
diff --git a/third_party/WebKit/Source/platform/audio/FFTFrame.h b/third_party/WebKit/Source/platform/audio/FFTFrame.h
index 2450084eb9fb641c72d9f03b9a4e96dc18e525c7..fccda3b423f022ef970350487c6769d21001612d 100644
--- a/third_party/WebKit/Source/platform/audio/FFTFrame.h
+++ b/third_party/WebKit/Source/platform/audio/FFTFrame.h
@@ -33,8 +33,8 @@
 #include "platform/audio/AudioArray.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
-#include "wtf/PassOwnPtr.h"
 #include "wtf/Threading.h"
+#include <memory>
 
 #if OS(MACOSX)
 #include <Accelerate/Accelerate.h>
@@ -74,7 +74,7 @@ public:
     // The remaining public methods have cross-platform implementations:
 
     // Interpolates from frame1 -> frame2 as x goes from 0.0 -> 1.0
-    static PassOwnPtr<FFTFrame> createInterpolatedFrame(const FFTFrame& frame1, const FFTFrame& frame2, double x);
+    static std::unique_ptr<FFTFrame> createInterpolatedFrame(const FFTFrame& frame1, const FFTFrame& frame2, double x);
     void doPaddedFFT(const float* data, size_t dataSize); // zero-padding with dataSize <= fftSize
     double extractAverageGroupDelay();
     void addConstantGroupDelay(double sampleFrameDelay);