Added a few bench for some image filters

gyp/bench.gypi

Index: gyp/bench.gypi
===================================================================
--- gyp/bench.gypi	(revision 8823)
+++ gyp/bench.gypi	(working copy)
@@ -10,25 +10,30 @@
     '../bench/BicubicBench.cpp',
     '../bench/BitmapBench.cpp',
     '../bench/BitmapRectBench.cpp',
+    '../bench/BlendBench.cpp',
     '../bench/BlurBench.cpp',
     '../bench/BlurRectBench.cpp',
     '../bench/ChecksumBench.cpp',
     '../bench/ChartBench.cpp',
     '../bench/ChromeBench.cpp',
+    '../bench/ColorFilterBench.cpp',
     '../bench/DashBench.cpp',
     '../bench/DecodeBench.cpp',
     '../bench/DeferredCanvasBench.cpp',
     '../bench/DeferredSurfaceCopyBench.cpp',
+    '../bench/DisplacementBench.cpp',
     '../bench/FontScalerBench.cpp',
     '../bench/GradientBench.cpp',
     '../bench/GrMemoryPoolBench.cpp',
     '../bench/InterpBench.cpp',
     '../bench/LineBench.cpp',
+    '../bench/MagnifierBench.cpp',
     '../bench/MathBench.cpp',
     '../bench/Matrix44Bench.cpp',
     '../bench/MatrixBench.cpp',
     '../bench/MatrixConvolutionBench.cpp',
     '../bench/MemoryBench.cpp',
+    '../bench/MergeBench.cpp',
     '../bench/MorphologyBench.cpp',
     '../bench/MutexBench.cpp',
     '../bench/PathBench.cpp',