[cc] Rename all cc/ filenames to Chromium style

cc/CCFrameRateCounter.cpp

Index: cc/CCFrameRateCounter.cpp
diff --git a/cc/CCFrameRateCounter.cpp b/cc/CCFrameRateCounter.cpp
deleted file mode 100644
index 80074edee6abd0e6b17aefc997d0a8931bbb8357..0000000000000000000000000000000000000000
--- a/cc/CCFrameRateCounter.cpp
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-
-#if USE(ACCELERATED_COMPOSITING)
-#include "CCFrameRateCounter.h"
-
-#include <cmath>
-
-#include "CCProxy.h"
-#include <public/Platform.h>
-#include <wtf/CurrentTime.h>
-
-namespace cc {
-
-const double CCFrameRateCounter::kFrameTooFast = 1.0 / 70.0; // measured in seconds
-const double CCFrameRateCounter::kFrameTooSlow = 1.0 / 12.0;
-const double CCFrameRateCounter::kDroppedFrameTime = 1.0 / 50.0;
-
-// safeMod works on -1, returning m-1 in that case.
-static inline int safeMod(int number, int modulus)
-{
-    return (number + modulus) % modulus;
-}
-
-inline double CCFrameRateCounter::frameInterval(int frameNumber) const
-{
-    return m_timeStampHistory[frameIndex(frameNumber)] -
-        m_timeStampHistory[frameIndex(frameNumber - 1)];
-}
-
-inline int CCFrameRateCounter::frameIndex(int frameNumber) const
-{
-    return safeMod(frameNumber, kTimeStampHistorySize);
-}
-
-CCFrameRateCounter::CCFrameRateCounter()
-    : m_currentFrameNumber(1)
-    , m_droppedFrameCount(0)
-{
-    m_timeStampHistory[0] = currentTime();
-    m_timeStampHistory[1] = m_timeStampHistory[0];
-    for (int i = 2; i < kTimeStampHistorySize; i++)
-        m_timeStampHistory[i] = 0;
-}
-
-void CCFrameRateCounter::markBeginningOfFrame(double timestamp)
-{
-    m_timeStampHistory[frameIndex(m_currentFrameNumber)] = timestamp;
-    double frameIntervalSeconds = frameInterval(m_currentFrameNumber);
-
-    if (CCProxy::hasImplThread() && m_currentFrameNumber > 0) {
-        double drawDelayMs = frameIntervalSeconds * 1000.0;
-        WebKit::Platform::current()->histogramCustomCounts("Renderer4.CompositorThreadImplDrawDelay", static_cast<int>(drawDelayMs), 1, 120, 60);
-    }
-
-    if (!isBadFrameInterval(frameIntervalSeconds) && frameIntervalSeconds > kDroppedFrameTime)
-        ++m_droppedFrameCount;
-}
-
-void CCFrameRateCounter::markEndOfFrame()
-{
-    m_currentFrameNumber += 1;
-}
-
-bool CCFrameRateCounter::isBadFrameInterval(double intervalBetweenConsecutiveFrames) const
-{
-    bool schedulerAllowsDoubleFrames = !CCProxy::hasImplThread();
-    bool intervalTooFast = schedulerAllowsDoubleFrames && intervalBetweenConsecutiveFrames < kFrameTooFast;
-    bool intervalTooSlow = intervalBetweenConsecutiveFrames > kFrameTooSlow;
-    return intervalTooFast || intervalTooSlow;
-}
-
-bool CCFrameRateCounter::isBadFrame(int frameNumber) const
-{
-    return isBadFrameInterval(frameInterval(frameNumber));
-}
-
-void CCFrameRateCounter::getAverageFPSAndStandardDeviation(double& averageFPS, double& standardDeviation) const
-{
-    int frame = m_currentFrameNumber - 1;
-    averageFPS = 0;
-    int averageFPSCount = 0;
-    double fpsVarianceNumerator = 0;
-
-    // Walk backwards through the samples looking for a run of good frame
-    // timings from which to compute the mean and standard deviation.
-    //
-    // Slow frames occur just because the user is inactive, and should be
-    // ignored. Fast frames are ignored if the scheduler is in single-thread
-    // mode in order to represent the true frame rate in spite of the fact that
-    // the first few swapbuffers happen instantly which skews the statistics
-    // too much for short lived animations.
-    //
-    // isBadFrame encapsulates the frame too slow/frame too fast logic.
-    while (1) {
-        if (!isBadFrame(frame)) {
-            averageFPSCount++;
-            double secForLastFrame = m_timeStampHistory[frameIndex(frame)] -
-                                     m_timeStampHistory[frameIndex(frame - 1)];
-            double x = 1.0 / secForLastFrame;
-            double deltaFromAverage = x - averageFPS;
-            // Change with caution - numerics. http://en.wikipedia.org/wiki/Standard_deviation
-            averageFPS = averageFPS + deltaFromAverage / averageFPSCount;
-            fpsVarianceNumerator = fpsVarianceNumerator + deltaFromAverage * (x - averageFPS);
-        }
-        if (averageFPSCount && isBadFrame(frame)) {
-            // We've gathered a run of good samples, so stop.
-            break;
-        }
-        --frame;
-        if (frameIndex(frame) == frameIndex(m_currentFrameNumber) || frame < 0) {
-            // We've gone through all available historical data, so stop.
-            break;
-        }
-    }
-
-    standardDeviation = sqrt(fpsVarianceNumerator / averageFPSCount);
-}
-
-double CCFrameRateCounter::timeStampOfRecentFrame(int n)
-{
-    ASSERT(n >= 0 && n < kTimeStampHistorySize);
-    int desiredIndex = (frameIndex(m_currentFrameNumber) + n) % kTimeStampHistorySize;
-    return m_timeStampHistory[desiredIndex];
-}
-
-} // namespace cc
-
-#endif // USE(ACCELERATED_COMPOSITING)