Removal of dependencies on PlatformDevice classes.

ui/gfx/canvas_skia_linux.cc

Index: ui/gfx/canvas_skia_linux.cc
===================================================================
--- ui/gfx/canvas_skia_linux.cc	(revision 85672)
+++ ui/gfx/canvas_skia_linux.cc	(working copy)
@@ -208,7 +208,7 @@
       text_height_(0) {
   DCHECK(!bounds_.IsEmpty());
 
-  cr_ = canvas_->beginPlatformPaint();
+  cr_ = skia::BeginPlatformPaint(canvas_);
   layout_ = pango_cairo_create_layout(cr_);
 
   SetupPangoLayout(layout_, text, font, bounds_.width(), flags_);
@@ -247,7 +247,7 @@
   cairo_restore(cr_);
 
   g_object_unref(layout_);
-  // NOTE: beginPlatformPaint returned its surface, we shouldn't destroy it.
+  // NOTE: BeginPlatformPaint returned its surface, we shouldn't destroy it.
 }
 
 void DrawStringContext::Draw(const SkColor& text_color) {
@@ -266,7 +266,7 @@
   text_canvas.FillRectInt(static_cast<SkColor>(0),
       0, 0, bounds_.width() + 2, bounds_.height() + 2);
 
-  cairo_t* text_cr = text_canvas.beginPlatformPaint();
+  cairo_t* text_cr = skia::BeginPlatformPaint(&text_canvas);
 
   cairo_move_to(text_cr, 2, 1);
   pango_cairo_layout_path(text_cr, layout_);
@@ -288,10 +288,10 @@
                         SkColorGetA(text_color) / 255.0);
   cairo_fill(text_cr);
 
-  text_canvas.endPlatformPaint();
+  skia::EndPlatformPaint(&text_canvas);
 
   const SkBitmap& text_bitmap = const_cast<SkBitmap&>(
-      text_canvas.getTopPlatformDevice().accessBitmap(false));
+      text_canvas.getTopDevice().accessBitmap(false));
   canvas_->DrawBitmapInt(text_bitmap, text_x_ - 1, text_y_ - 1);
 }
 
@@ -379,7 +379,7 @@
     return;
   }
 
-  cairo_t* cr = beginPlatformPaint();
+  cairo_t* cr = skia::BeginPlatformPaint(this);
   gdk_cairo_set_source_pixbuf(cr, pixbuf, x, y);
   cairo_paint(cr);
 }