Add WebKitUnitTestSupport::readFromFile and deprecate all PlatformFileHandle related methods

Source/core/platform/image-decoders/gif/GIFImageDecoderTest.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * 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.
  */
 
 #include "config.h"
 
 #include "core/platform/image-decoders/gif/GIFImageDecoder.h"
 
-#include "core/platform/FileSystem.h"
 #include "core/platform/SharedBuffer.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebData.h"
 #include "public/platform/WebSize.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/StringHasher.h"
 #include "wtf/Vector.h"
 #include <gtest/gtest.h>
 
 using namespace WebCore;
 using namespace WebKit;
 
 #if !OS(ANDROID)
 
 namespace {
 
 PassRefPtr<SharedBuffer> readFile(const char* fileName)
 {
     String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
     filePath.append(fileName);
 
-    long long fileSize;
-    if (!getFileSize(filePath, fileSize))
-        return 0;
-
-    PlatformFileHandle handle = openFile(filePath, OpenForRead);
-    int fileLength = static_cast<int>(fileSize);
-    Vector<char> buffer(fileLength);
-    readFromFile(handle, buffer.data(), fileLength);
-    closeFile(handle);
-    return SharedBuffer::adoptVector(buffer);
+    return Platform::current()->unitTestSupport()->readFromFile(filePath);
 }
 
 PassOwnPtr<GIFImageDecoder> createDecoder()
 {
     return adoptPtr(new GIFImageDecoder(ImageSource::AlphaNotPremultiplied, ImageSource::GammaAndColorProfileApplied));
 }
 
 unsigned hashSkBitmap(const SkBitmap& bitmap)
 {
     return StringHasher::hashMemory(bitmap.getPixels(), bitmap.getSize());
@@ skipping 379 matching lines @@
     EXPECT_EQ(baselineHashes[frameCount - 1], hashSkBitmap(lastFrame->getSkBitmap()));
     decoder->clearCacheExceptFrame(notFound);
 
     // Resume decoding of the first frame.
     ImageFrame* firstFrame = decoder->frameBufferAtIndex(0);
     EXPECT_EQ(ImageFrame::FrameComplete, firstFrame->status());
     EXPECT_EQ(baselineHashes[0], hashSkBitmap(firstFrame->getSkBitmap()));
 }
 
 #endif