Merge to XFA: FX_NAMESPACE_DECLARE pointless.

Orignal Review URL: https://codereview.chromium.org/1534003002 .
(cherry picked from commit fed9dd90c086c854ef13440e6022602eb9f91cfc)

TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1537463003 .
diff --git a/core/include/fxcrt/fx_basic.h b/core/include/fxcrt/fx_basic.h
index c5b8b38..52d0f14 100644
--- a/core/include/fxcrt/fx_basic.h
+++ b/core/include/fxcrt/fx_basic.h
@@ -1198,7 +1198,6 @@
   Done
 } FX_ProgressiveStatus;
 #define ProgressiveStatus FX_ProgressiveStatus
-#define FX_NAMESPACE_DECLARE(namespace, type) namespace ::type
 #ifdef PDF_ENABLE_XFA
 class IFX_Unknown {
  public:
diff --git a/core/src/fxge/agg/include/fx_agg_driver.h b/core/src/fxge/agg/include/fx_agg_driver.h
index 80febe1..7156974 100644
--- a/core/src/fxge/agg/include/fx_agg_driver.h
+++ b/core/src/fxge/agg/include/fx_agg_driver.h
@@ -19,9 +19,10 @@
  public:
   CAgg_PathData() {}
   ~CAgg_PathData() {}
-  FX_NAMESPACE_DECLARE(agg, path_storage) m_PathData;
   void BuildPath(const CFX_PathData* pPathData,
                  const CFX_Matrix* pObject2Device);
+
+  agg::path_storage m_PathData;
 };
 class CFX_AggDeviceDriver : public IFX_RenderDeviceDriver {
  public:
@@ -122,16 +123,14 @@
                          void* pIccTransform) override;
   int GetDriverType() override { return 1; }
 
-  FX_BOOL RenderRasterizer(FX_NAMESPACE_DECLARE(agg, rasterizer_scanline_aa) &
-                               rasterizer,
+  FX_BOOL RenderRasterizer(agg::rasterizer_scanline_aa& rasterizer,
                            FX_DWORD color,
                            FX_BOOL bFullCover,
                            FX_BOOL bGroupKnockout,
                            int alpha_flag,
                            void* pIccTransform);
 
-  void SetClipMask(FX_NAMESPACE_DECLARE(agg, rasterizer_scanline_aa) &
-                   rasterizer);
+  void SetClipMask(agg::rasterizer_scanline_aa& rasterizer);
 
   virtual uint8_t* GetBuffer() const { return m_pBitmap->GetBuffer(); }