Remove all of WebCore/platform/mac which is not mentioned in WebCore.gypi.

Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm

Index: Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm
diff --git a/Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm b/Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm
deleted file mode 100644
index 3848f6cd9973f8b3a7a907cf2519d52c24e5929f..0000000000000000000000000000000000000000
--- a/Source/WebCore/platform/mac/MemoryPressureHandlerMac.mm
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * Copyright (C) 2011, 2012 Apple Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#import "config.h"
-#import "MemoryPressureHandler.h"
-
-#import <WebCore/CSSValuePool.h>
-#import <WebCore/GCController.h>
-#import <WebCore/FontCache.h>
-#import <WebCore/MemoryCache.h>
-#import <WebCore/PageCache.h>
-#import <WebCore/LayerPool.h>
-#import <WebCore/ScrollingThread.h>
-#import <WebCore/StorageThread.h>
-#import <WebCore/WorkerThread.h>
-#import <wtf/CurrentTime.h>
-#import <wtf/FastMalloc.h>
-#import <wtf/Functional.h>
-
-#if !PLATFORM(IOS) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
-#import "WebCoreSystemInterface.h"
-#import <notify.h>
-#endif
-
-using std::max;
-
-namespace WebCore {
-
-#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
-
-#if !PLATFORM(IOS)
-static dispatch_source_t _cache_event_source = 0;
-static dispatch_source_t _timer_event_source = 0;
-static int _notifyToken;
-
-// Disable memory event reception for a minimum of s_minimumHoldOffTime
-// seconds after receiving an event.  Don't let events fire any sooner than
-// s_holdOffMultiplier times the last cleanup processing time.  Effectively 
-// this is 1 / s_holdOffMultiplier percent of the time.
-// These value seems reasonable and testing verifies that it throttles frequent
-// low memory events, greatly reducing CPU usage.
-static const unsigned s_minimumHoldOffTime = 5;
-static const unsigned s_holdOffMultiplier = 20;
-
-void MemoryPressureHandler::install()
-{
-    if (m_installed || _timer_event_source)
-        return;
-
-    dispatch_async(dispatch_get_main_queue(), ^{
-        _cache_event_source = wkCreateVMPressureDispatchOnMainQueue();
-        if (_cache_event_source) {
-            dispatch_set_context(_cache_event_source, this);
-            dispatch_source_set_event_handler(_cache_event_source, ^{ memoryPressureHandler().respondToMemoryPressure();});
-            dispatch_resume(_cache_event_source);
-        }
-    });
-
-    notify_register_dispatch("org.WebKit.lowMemory", &_notifyToken,
-         dispatch_get_main_queue(), ^(int) { memoryPressureHandler().respondToMemoryPressure();});
-
-    m_installed = true;
-}
-
-void MemoryPressureHandler::uninstall()
-{
-    if (!m_installed)
-        return;
-
-    dispatch_async(dispatch_get_main_queue(), ^{
-        if (_cache_event_source) {
-            dispatch_source_cancel(_cache_event_source);
-            dispatch_release(_cache_event_source);
-            _cache_event_source = 0;
-        }
-
-        if (_timer_event_source) {
-            dispatch_source_cancel(_timer_event_source);
-            dispatch_release(_timer_event_source);
-            _timer_event_source = 0;
-        }
-    });
-
-    m_installed = false;
-    
-    notify_cancel(_notifyToken);
-}
-
-void MemoryPressureHandler::holdOff(unsigned seconds)
-{
-    dispatch_async(dispatch_get_main_queue(), ^{
-        _timer_event_source = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());
-        if (_timer_event_source) {
-            dispatch_set_context(_timer_event_source, this);
-            dispatch_source_set_timer(_timer_event_source, dispatch_time(DISPATCH_TIME_NOW, seconds * NSEC_PER_SEC), DISPATCH_TIME_FOREVER, 1 * s_minimumHoldOffTime);
-            dispatch_source_set_event_handler(_timer_event_source, ^{
-                if (_timer_event_source) {
-                    dispatch_source_cancel(_timer_event_source);
-                    dispatch_release(_timer_event_source);
-                    _timer_event_source = 0;
-                }
-                memoryPressureHandler().install();
-            });
-            dispatch_resume(_timer_event_source);
-        }
-    });
-}
-
-void MemoryPressureHandler::respondToMemoryPressure()
-{
-    uninstall();
-
-    double startTime = monotonicallyIncreasingTime();
-
-    m_lowMemoryHandler(false);
-
-    unsigned holdOffTime = (monotonicallyIncreasingTime() - startTime) * s_holdOffMultiplier;
-
-    holdOff(max(holdOffTime, s_minimumHoldOffTime));
-}
-#endif // !PLATFORM(IOS)
-
-void MemoryPressureHandler::releaseMemory(bool)
-{
-    int savedPageCacheCapacity = pageCache()->capacity();
-    pageCache()->setCapacity(0);
-    pageCache()->setCapacity(savedPageCacheCapacity);
-
-    NSURLCache *nsurlCache = [NSURLCache sharedURLCache];
-    NSUInteger savedNsurlCacheMemoryCapacity = [nsurlCache memoryCapacity];
-    [nsurlCache setMemoryCapacity:0];
-    [nsurlCache setMemoryCapacity:savedNsurlCacheMemoryCapacity];
-
-    fontCache()->purgeInactiveFontData();
-
-    memoryCache()->pruneToPercentage(0);
-
-    LayerPool::sharedPool()->drain();
-
-    cssValuePool().drain();
-
-    gcController().discardAllCompiledCode();
-
-    // FastMalloc has lock-free thread specific caches that can only be cleared from the thread itself.
-    StorageThread::releaseFastMallocFreeMemoryInAllThreads();
-#if ENABLE(WORKERS)
-    WorkerThread::releaseFastMallocFreeMemoryInAllThreads();
-#endif
-#if ENABLE(THREADED_SCROLLING)
-    ScrollingThread::dispatch(bind(WTF::releaseFastMallocFreeMemory));
-#endif
-    WTF::releaseFastMallocFreeMemory();
-}
-#endif
-
-} // namespace WebCore