enable fallback path

third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp

Index: third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp b/third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp
index 4e8a92b4db7f35c194fb626cc306b94c37dfe78a..129d7c5062b2d974c42bbbc6e38796da51a43988 100644
--- a/third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp
@@ -200,16 +200,13 @@ WebLayer* ImageBuffer::platformLayer() const {
 
 bool ImageBuffer::copyToPlatformTexture(SnapshotReason reason,
                                         gpu::gles2::GLES2Interface* gl,
+                                        GLenum target,
                                         GLuint texture,
-                                        GLenum internalFormat,
-                                        GLenum destType,
-                                        GLint level,
                                         bool premultiplyAlpha,
                                         bool flipY,
                                         const IntPoint& destPoint,
                                         const IntRect& sourceSubRectangle) {
-  if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(
-          GL_TEXTURE_2D, internalFormat, destType, level))
+  if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(target))
     return false;
 
   if (!isSurfaceValid())
@@ -260,7 +257,7 @@ bool ImageBuffer::copyToPlatformTexture(SnapshotReason reason,
   // It is expected that callers of this method have already allocated
   // the platform texture with the appropriate size.
   gl->CopySubTextureCHROMIUM(
-      sourceTexture, 0, GL_TEXTURE_2D, texture, 0, destPoint.x(), destPoint.y(),
+      sourceTexture, 0, target, texture, 0, destPoint.x(), destPoint.y(),
       sourceSubRectangle.x(), sourceSubRectangle.y(),
       sourceSubRectangle.width(), sourceSubRectangle.height(),
       flipY ? GL_FALSE : GL_TRUE, GL_FALSE,
@@ -304,7 +301,7 @@ bool ImageBuffer::copyRenderingResultsFromDrawingBuffer(
   gl->Flush();
 
   return drawingBuffer->copyToPlatformTexture(
-      gl, textureId, GL_RGBA, GL_UNSIGNED_BYTE, 0, true, false, IntPoint(0, 0),
+      gl, GL_TEXTURE_2D, textureId, true, false, IntPoint(0, 0),
       IntRect(IntPoint(0, 0), drawingBuffer->size()), sourceBuffer);
 }