Refactor the PlatformContext layer to have only one class.

Previously we had three classes of PlatformCanvas*, one for each platform. Then
we had a typedef of PlatformContext to PlatformCanvas[Mac|Win|Linux] for the
specific platform.

This means that it was almost impossible to forward-declare PlatformCanvas and
there were a bunch of unnecessary includes of platform_canvas.h in header
files.

This change makes there be only one platform_canvas.h header with ifdefs, which
removes a decent amount of duplicated code. There is a platform-independent
file, and one platform-dependent file of platform_canvas for each platform.

I also renamed PlatformDevice[Mac|Win|Linux] to PlatformDevice, althouth in
this case I kept the separate headers since there was much less overlap.

I also broke out CanvasPaint into separate headers so this template doesn't
need to be included all over the project (only a couple of files actually need
it).

Review URL: http://codereview.chromium.org/125109

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18363 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 2 deletions

diff --git a/skia/ext/platform_device_linux.h b/skia/ext/platform_device_linux.h
index e438d85a..c23a4d8 100644
--- a/skia/ext/platform_device_linux.h
+++ b/skia/ext/platform_device_linux.h
@@ -12,8 +12,10 @@ typedef struct _cairo_surface cairo_surface_t;
 namespace skia {
 
 // Blindly copying the mac hierarchy.
-class PlatformDeviceLinux : public SkDevice {
+class PlatformDevice : public SkDevice {
  public:
+  typedef cairo_surface_t* PlatformSurface;
+
   // Returns if the preferred rendering engine is vectorial or bitmap based.
   virtual bool IsVectorial() = 0;
 
@@ -21,7 +23,7 @@ class PlatformDeviceLinux : public SkDevice {
 
  protected:
   // Forwards |bitmap| to SkDevice's constructor.
-  PlatformDeviceLinux(const SkBitmap& bitmap);
+  PlatformDevice(const SkBitmap& bitmap);
 };
 
 }  // namespace skia