Rename WebCore namespace to blink in Platform

Source/platform/graphics/UnacceleratedImageBufferSurface.cpp

Index: Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
diff --git a/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
index 9151c31094bac253c67e2f132f4f7d00f0517c83..c7696ce2fbb2ba4c653488bb552ad883a37ccb70 100644
--- a/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
+++ b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
@@ -34,7 +34,7 @@
 #include "third_party/skia/include/core/SkSurface.h"
 #include "wtf/PassRefPtr.h"
 
-namespace WebCore {
+namespace blink {
 
 UnacceleratedImageBufferSurface::UnacceleratedImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
     : ImageBufferSurface(size, opacityMode)
@@ -56,4 +56,4 @@ bool UnacceleratedImageBufferSurface::isValid() const
     return m_surface;
 }
 
-} // namespace WebCore
+} // namespace blink