CL removing inheritance of SkDevice from PlatformDevice. Flavours of PlatformDevice classes now ...

skia/ext/vector_platform_device_emf_win.cc

Index: skia/ext/vector_platform_device_emf_win.cc
===================================================================
--- skia/ext/vector_platform_device_emf_win.cc	(revision 96545)
+++ skia/ext/vector_platform_device_emf_win.cc	(working copy)
@@ -15,9 +15,9 @@
 namespace skia {
 
 //static
-PlatformDevice* VectorPlatformDeviceEmf::CreateDevice(int width, int height,
-                                                      bool is_opaque,
-                                                      HANDLE shared_section) {
+SkDevice* VectorPlatformDeviceEmf::CreateDevice(int width, int height,
+                                                bool is_opaque,
+                                                HANDLE shared_section) {
   if (!is_opaque) {
     // TODO(maruel):  http://crbug.com/18382 When restoring a semi-transparent
     // layer, i.e. merging it, we need to rasterize it because GDI doesn't
@@ -40,7 +40,7 @@
   // SkScalarRound(value) as SkScalarRound(value * 10). Safari is already
   // doing the same for text rendering.
   SkASSERT(shared_section);
-  PlatformDevice* device = VectorPlatformDeviceEmf::create(
+  SkDevice* device = VectorPlatformDeviceEmf::create(
       reinterpret_cast<HDC>(shared_section), width, height);
   return device;
 }
@@ -59,9 +59,7 @@
   hdr->biClrImportant = 0;
 }
 
-VectorPlatformDeviceEmf* VectorPlatformDeviceEmf::create(HDC dc,
-                                                         int width,
-                                                         int height) {
+SkDevice* VectorPlatformDeviceEmf::create(HDC dc, int width, int height) {
   InitializeDC(dc);
 
   // Link the SkBitmap to the current selected bitmap in the device context.
@@ -92,16 +90,23 @@
   if (!succeeded)
     bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
 
-  return new VectorPlatformDeviceEmf(dc, bitmap);
+  VectorPlatformDeviceEmf* vector_device = new VectorPlatformDeviceEmf(dc, bitmap);
+  //return new VectorPlatformDeviceEmf(dc, bitmap);
+  return vector_device->GetOwningDevice();
 }
 
 VectorPlatformDeviceEmf::VectorPlatformDeviceEmf(HDC dc, const SkBitmap& bitmap)
-    : PlatformDevice(bitmap),
+    : SkDevice(bitmap),
+      PlatformDevice(static_cast<SkDevice*>(this)),
       hdc_(dc),
       previous_brush_(NULL),
       previous_pen_(NULL),
       alpha_blend_used_(false) {
   transform_.reset();
+  // Pass false, because VectorPlatformDeviceEmf inherits both SkDevice, and
+  // PlatformDevice, so there is no need to explicitly bind the lifetime of the
+  // two classes.
+  SetPlatformDevice(device_, this, false);
 }
 
 VectorPlatformDeviceEmf::~VectorPlatformDeviceEmf() {