Merge "Set high usage delta to 1 to avoid constant V8 GC." into honeycomb

    private int mLowMemoryUsageThresholdMb;

    private int mLowMemoryUsageThresholdMb;

    private int mHighMemoryUsageThresholdMb;

    private int mHighMemoryUsageThresholdMb;

    private int mHighUsageDeltaMb;

    // The thread name used to identify the WebCore thread and for use in

    // The thread name used to identify the WebCore thread and for use in

    // debugging other classes that require operation within the WebCore thread.

    // debugging other classes that require operation within the WebCore thread.

        // Allow us to use up to our memory class value before V8's GC kicks in.

        // Allow us to use up to our memory class value before V8's GC kicks in.

        // These values have been determined by experimentation.

        // These values have been determined by experimentation.

        mLowMemoryUsageThresholdMb = manager.getMemoryClass();

        mLowMemoryUsageThresholdMb = manager.getLargeMemoryClass();

        // If things get crazy, allow V8 to use up to 3 times our memory class, or a third of the

        // If things get crazy, allow V8 to use up to 3 times our memory class, or a third of the

        // device's total available memory, whichever is smaller. At that point V8 will start

        // device's total available memory, whichever is smaller.  This value must be no less

        // attempting more aggressive garbage collection.

        // than the low memory threshold.

        mHighMemoryUsageThresholdMb = Math.min(mLowMemoryUsageThresholdMb * 3,

        // At that point V8 will start attempting more aggressive garbage collection.

                (int) (memInfo.availMem / 3) >> 20);

        mHighMemoryUsageThresholdMb = Math.max(Math.min(mLowMemoryUsageThresholdMb * 3,

                (int) (memInfo.availMem / 3) >> 20), mLowMemoryUsageThresholdMb);

        // Avoid constant V8 GC when memory usage equals to working set estimate.

        mHighUsageDeltaMb = 1;

        // Send a message to initialize the WebViewCore.

        // Send a message to initialize the WebViewCore.

        Message init = sWebCoreHandler.obtainMessage(

        Message init = sWebCoreHandler.obtainMessage(