Cleanup namespace usage in platform/graphics/[G-S]*

Source/platform/graphics/ImageBuffer.h

Index: Source/platform/graphics/ImageBuffer.h
diff --git a/Source/platform/graphics/ImageBuffer.h b/Source/platform/graphics/ImageBuffer.h
index 6638122cde8ea6065c296799ea1bef9188315b55..f52516a4c97c6fd81d9b7c794c827ad93b11747d 100644
--- a/Source/platform/graphics/ImageBuffer.h
+++ b/Source/platform/graphics/ImageBuffer.h
@@ -46,10 +46,6 @@
 class SkCanvas;
 
 namespace blink {
-class WebGraphicsContext3D;
-}
-
-namespace blink {
 
 class DrawingBuffer;
 class GraphicsContext;
@@ -57,6 +53,7 @@ class Image;
 class ImageBufferClient;
 class IntPoint;
 class IntRect;
+class WebGraphicsContext3D;
 
 enum Multiply {
     Premultiplied,
@@ -112,13 +109,13 @@ public:
     String toDataURL(const String& mimeType, const double* quality = 0) const;
     AffineTransform baseTransform() const { return AffineTransform(); }
     void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
-    blink::WebLayer* platformLayer() const;
+    WebLayer* platformLayer() const;
 
     // FIXME: current implementations of this method have the restriction that they only work
     // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in
     // Extensions3D::canUseCopyTextureCHROMIUM().
     // Destroys the TEXTURE_2D binding for the active texture unit of the passed context
-    bool copyToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject, GLenum, GLenum, GLint, bool, bool);
+    bool copyToPlatformTexture(WebGraphicsContext3D*, Platform3DObject, GLenum, GLenum, GLint, bool, bool);
 
     Platform3DObject getBackingTexture();
 
@@ -132,7 +129,7 @@ private:
     ImageBuffer(PassOwnPtr<ImageBufferSurface>);
 
     void draw(GraphicsContext*, const FloatRect&, const FloatRect* = 0, CompositeOperator = CompositeSourceOver, WebBlendMode = WebBlendModeNormal);
-    void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing = IntSize());
+    void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, WebBlendMode, const IntSize& repeatSpacing = IntSize());
     static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
 
     friend class GraphicsContext;