Make cc/paint have concrete types

third_party/WebKit/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.cpp

Index: third_party/WebKit/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.cpp b/third_party/WebKit/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.cpp
index 78847f69dcdef6924ccf9c02bd5bc266a2ee61cc..2ca2f357a1fec60c6c8abec79804991554be4875 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.cpp
+++ b/third_party/WebKit/Source/platform/graphics/gpu/AcceleratedImageBufferSurface.cpp
@@ -56,16 +56,17 @@ AcceleratedImageBufferSurface::AcceleratedImageBufferSurface(
   SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType,
                                        alphaType, colorSpace);
   SkSurfaceProps disableLCDProps(0, kUnknown_SkPixelGeometry);
-  m_surface = PaintSurface::MakeRenderTarget(
+  m_surface = SkSurface::MakeRenderTarget(
       grContext, SkBudgeted::kYes, info, 0 /* sampleCount */,
       Opaque == opacityMode ? nullptr : &disableLCDProps);
-  if (!m_surface)
+  if (!m_surface || !m_surface->getCanvas())
     return;
+  m_canvas = WTF::wrapUnique(new PaintCanvas(m_surface->getCanvas()));
   clear();
 
   // Always save an initial frame, to support resetting the top level matrix
   // and clip.
-  m_surface->getCanvas()->save();
+  m_canvas->save();
 }
 
 bool AcceleratedImageBufferSurface::isValid() const {
@@ -83,7 +84,7 @@ GLuint AcceleratedImageBufferSurface::getBackingTextureHandleForOverwrite() {
     return 0;
   return skia::GrBackendObjectToGrGLTextureInfo(
              m_surface->getTextureHandle(
-                 PaintSurface::kDiscardWrite_TextureHandleAccess))
+                 SkSurface::kDiscardWrite_TextureHandleAccess))
       ->fID;
 }