-Wuninitialized fixes

webkit.patch

Index: webkit.patch
diff --git a/webkit.patch b/webkit.patch
new file mode 100644
index 0000000000000000000000000000000000000000..8b9f5f7ad5fb8e564bc8b9a9f242cb6e2d8c8791
--- /dev/null
+++ b/webkit.patch
@@ -0,0 +1,13 @@
+diff --git a/Source/WebCore/fileapi/Blob.cpp b/Source/WebCore/fileapi/Blob.cpp
+index 90df3c4..44f3946 100644
+--- a/Source/WebCore/fileapi/Blob.cpp
++++ b/Source/WebCore/fileapi/Blob.cpp
+@@ -68,7 +68,7 @@ PassRefPtr<Blob> Blob::slice(long long start, long long length, const String& co
+     // When we slice a file for the first time, we obtain a snapshot of the file by capturing its current size and modification time.
+     // The modification time will be used to verify if the file has been changed or not, when the underlying data are accessed.
+     long long size;
+-    double modificationTime;
++    double modificationTime = 0;  // clang prXXXX
+     if (isFile())
+         // FIXME: This involves synchronous file operation. We need to figure out how to make it asynchronous.
+         static_cast<const File*>(this)->captureSnapshot(size, modificationTime);