call clear() instead of using deprecated API accessBitmap()

BUG=

Review URL: https://codereview.chromium.org/168833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251778 0039d316-1c4b-4281-b951-d872f2087c98

skia/ext/bitmap_platform_device_mac.cc

@@ -146,7 +146,7 @@ BitmapPlatformDevice* BitmapPlatformDevice::CreateAndClear(int width,
                                                            bool is_opaque) {
   BitmapPlatformDevice* device = Create(NULL, width, height, is_opaque);
   if (!is_opaque)
-    device->accessBitmap(true).eraseARGB(0, 0, 0, 0);
+    device->clear(0);
   return device;
 }
 

skia/ext/bitmap_platform_device_skia.cc

@@ -27,7 +27,7 @@ BitmapPlatformDevice* BitmapPlatformDevice::CreateAndClear(int width,
                                                            bool is_opaque) {
   BitmapPlatformDevice* device = Create(width, height, is_opaque);
   if (!is_opaque)
-    device->accessBitmap(true).eraseARGB(0, 0, 0, 0);
+    device->clear(0);
   return device;
 }
 

skia/ext/bitmap_platform_device_win.cc

@@ -157,7 +157,7 @@ BitmapPlatformDevice* BitmapPlatformDevice::CreateAndClear(int width,
   BitmapPlatformDevice* device = BitmapPlatformDevice::Create(width, height,
                                                               is_opaque);
   if (device && !is_opaque)
-    device->accessBitmap(true).eraseARGB(0, 0, 0, 0);
+    device->clear(0);
   return device;
 }