Fix per-tile painting support in Pepper Graphics2D plugins by using a temporary device independent …

webkit/plugins/ppapi/ppb_graphics_2d_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/plugins/ppapi/ppb_graphics_2d_impl.h"
 
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 530 matching lines @@
         SkIntToScalar(image_data_->height()));
     canvas->clipRect(image_data_rect, SkRegion::kDifference_Op);
 
     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     paint.setColor(SK_ColorWHITE);
     canvas->drawRect(sk_plugin_rect, paint);
     canvas->restore();
   }
 
+  SkBitmap image;
+  // Copy to device independent bitmap when target canvas doesn't support
+  // platform paint.
+  if (!skia::SupportsPlatformPaint(canvas))
+    backing_bitmap.copyTo(&image, SkBitmap::kARGB_8888_Config);
+  else
+    image = backing_bitmap;
+
   SkPaint paint;
   if (is_always_opaque_) {
     // When we know the device is opaque, we can disable blending for slightly
     // more optimized painting.
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
   }
-  canvas->drawBitmap(backing_bitmap,
+  canvas->drawBitmap(image,
                      SkIntToScalar(plugin_rect.x()),
                      SkIntToScalar(plugin_rect.y()),
                      &paint);
   canvas->restore();
 #endif
 }
 
 void PPB_Graphics2D_Impl::ViewWillInitiatePaint() {
   // Move any "unpainted" callback to the painted state. See
   // |unpainted_flush_callback_| in the header for more.
@@ skipping 104 matching lines @@
 }
 
 bool PPB_Graphics2D_Impl::HasPendingFlush() const {
   return !unpainted_flush_callback_.is_null() ||
          !painted_flush_callback_.is_null() ||
          offscreen_flush_pending_;
 }
 
 }  // namespace ppapi
 }  // namespace webkit