Add m-esr52 at 52.6.0

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+This color conversion code is from the Chromium open source project available here:
+
+http://code.google.com/chromium/
+
+The code comes from svn revision 63840 on 2010-10-26.
+
+If you just want to check out this individual directory, use:
+
+svn co -r 63840 http://src.chromium.org/svn/trunk/src/media/base
+
+The code was copied from a Chromium svn checkout using the 'update.sh' script which then applies patches for our build and to add dynamic CPU detection.
+
+convert.patch contains the following changes:
+
+  * Change Chromium code to build using Mozilla build system.
+  * Add runtime CPU detection for MMX
+  * Move default C implementation to work on all platforms.
+  * Change Chromium code to allow a picture region.
+  * The YUV conversion will convert within this picture region only.
+  * Add YCbCr 4:4:4 support
+  * Bug 619178 - Update CPU detection in yuv_convert to new SSE.h interface.
+  * Bug 616778 - Split yuv_convert FilterRows vectorized code into separate files so it can
+    be properly guarded with cpuid() calls.
+
+win64.patch: SSE2 optimization for Microsoft Visual C++ x64 version
+
+TypeFromSize.patch: Bug 656185 - Add a method to detect YUVType from plane sizes.
+
+QuellGccWarnings.patch: Bug 711895 - Avoid some GCC compilation warnings.