Remove PPB_ImageData_API::GetPlatformCanvas()

ppapi/thunk/ppb_image_data_api.h

Index: ppapi/thunk/ppb_image_data_api.h
diff --git a/ppapi/thunk/ppb_image_data_api.h b/ppapi/thunk/ppb_image_data_api.h
index ec2a716cf4e34e7e7a8b9101cbd45662e9e38f91..af1eaefb6925c59664b21de2551a7f130d4eadae 100644
--- a/ppapi/thunk/ppb_image_data_api.h
+++ b/ppapi/thunk/ppb_image_data_api.h
@@ -31,19 +31,6 @@ class PPB_ImageData_API {
   virtual int32_t GetSharedMemory(base::SharedMemory** shm,
                                   uint32_t* byte_count) = 0;
 
-  // Get the platform-specific canvas that backs this ImageData, if there is
-  // one.
-  // The canvas will be NULL:
-  //   * If the image is not mapped.
-  //   * Within untrusted code (which does not have skia).
-  //   * If the ImageData is not backed by a platform-specific image buffer.
-  //     This will be the case for ImageDatas created for use in NaCl.
-  // For this last reason, you should prefer GetCanvas any time you don't need
-  // a platform-specific canvas (e.g., for use with platform-specific APIs).
-  // Anything that relies on having a PlatformCanvas will not work for ImageDat
-  // objects created from NaCl.
-  virtual SkCanvas* GetPlatformCanvas() = 0;
-
   // Get the canvas that backs this ImageData, if there is one.
   // The canvas will be NULL:
   //   * If the image is not mapped.