[Oilpan] Unify memory usage reporters of Oilpan

third_party/WebKit/Source/modules/webaudio/PeriodicWave.h

Index: third_party/WebKit/Source/modules/webaudio/PeriodicWave.h
diff --git a/third_party/WebKit/Source/modules/webaudio/PeriodicWave.h b/third_party/WebKit/Source/modules/webaudio/PeriodicWave.h
index 0fb51be5ebce1e2a85ec5df92b9a2f2e69929739..24eb50fe0c06e78fb3bfe55e37d360fa84b35e2b 100644
--- a/third_party/WebKit/Source/modules/webaudio/PeriodicWave.h
+++ b/third_party/WebKit/Source/modules/webaudio/PeriodicWave.h
@@ -74,8 +74,6 @@ private:
 
     void generateBasicWaveform(int);
 
-    size_t m_v8ExternalMemory;
-
     float m_sampleRate;
     unsigned m_numberOfRanges;
     float m_centsPerRange;
@@ -92,8 +90,6 @@ private:
 
     unsigned numberOfPartialsForRange(unsigned rangeIndex) const;
 
-    void adjustV8ExternalMemory(int delta);
-
     // Creates tables based on numberOfComponents Fourier coefficients.
     void createBandLimitedTables(const float* real, const float* imag, unsigned numberOfComponents, bool disableNormalization);
     Vector<OwnPtr<AudioFloatArray>> m_bandLimitedTables;