enable fallback path

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp

Index: third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
index b967171ef7eaaa503f805f4cca17ac8717e9f088..de3b4be763c3943d67ddde160b8cbe371378a484 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
@@ -683,10 +683,8 @@ bool DrawingBuffer::initialize(const IntSize& size, bool useMultisampling) {
 }
 
 bool DrawingBuffer::copyToPlatformTexture(gpu::gles2::GLES2Interface* gl,
+                                          GLenum textureTarget,
                                           GLuint texture,
-                                          GLenum internalFormat,
-                                          GLenum destType,
-                                          GLint level,
                                           bool premultiplyAlpha,
                                           bool flipY,
                                           const IntPoint& destTextureOffset,
@@ -700,9 +698,7 @@ bool DrawingBuffer::copyToPlatformTexture(gpu::gles2::GLES2Interface* gl,
     m_gl->Flush();
   }
 
-  // Assume that the destination target is GL_TEXTURE_2D.
-  if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(
-          GL_TEXTURE_2D, internalFormat, destType, level))
+  if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(textureTarget))
     return false;
 
   // Contexts may be in a different share group. We must transfer the texture
@@ -741,7 +737,7 @@ bool DrawingBuffer::copyToPlatformTexture(gpu::gles2::GLES2Interface* gl,
     unpackPremultiplyAlphaNeeded = GL_TRUE;
 
   gl->CopySubTextureCHROMIUM(
-      sourceTexture, 0, GL_TEXTURE_2D, texture, 0, destTextureOffset.x(),
+      sourceTexture, 0, textureTarget, texture, 0, destTextureOffset.x(),
       destTextureOffset.y(), sourceSubRectangle.x(), sourceSubRectangle.y(),
       sourceSubRectangle.width(), sourceSubRectangle.height(), flipY,
       unpackPremultiplyAlphaNeeded, unpackUnpremultiplyAlphaNeeded);