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_mac.h b/skia/ext/platform_device_mac.h
index 2005e89..97efd7c 100644
--- a/skia/ext/platform_device_mac.h
+++ b/skia/ext/platform_device_mac.h
@@ -20,8 +20,10 @@ namespace skia {
 // functions.
 // This class is abstract and must be subclassed. It provides the basic
 // interface to implement it either with or without a bitmap backend.
-class PlatformDeviceMac : public SkDevice {
+class PlatformDevice : public SkDevice {
  public:
+  typedef CGContextRef PlatformSurface;
+
   // The CGContext that corresponds to the bitmap, used for CoreGraphics
   // operations drawing into the bitmap. This is possibly heavyweight, so it
   // should exist only during one pass of rendering.
@@ -52,7 +54,7 @@ class PlatformDeviceMac : public SkDevice {
 
  protected:
   // Forwards |bitmap| to SkDevice's constructor.
-  PlatformDeviceMac(const SkBitmap& bitmap);
+  PlatformDevice(const SkBitmap& bitmap);
 
   // Loads the specified Skia transform into the device context
   static void LoadTransformToCGContext(CGContextRef context,