Chrome Version: 
Google Chrome: 66.0.3332.0
Platform: 10323.4.0


What steps will reproduce the problem?
(1) go to images.google.com, search for anything, like "red"
(2) right click on any of the images that appears, and then click on "Copy Image"
(3) Read Clipboard HTML contents with:
`clipboard->ReadHTML(ui::CLIPBOARD_TYPE_COPY_PASTE, &markup16, &url,
                      &fragment_start, &fragment_end);`


What is the expected result?
Inline-image should be encoded like this:
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAMAAACahl6sAAAAA1BMVEX5AhQ1g8N6AAAAPUlEQVR4nO3BAQ0AAADCoPdPbQ8HFAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA8GadCAABYe850QAAAABJRU5ErkJggg==" />

What happens instead?
Inline-image is encoded like this:
<img src="data%3Aimage/png%3Bbase64%2CiVBORw0KGgoAAAANSUhEUgAAAMgAAADICAMAAACahl6sAAAAA1BMVEX5AhQ1g8N6AAAAPUlEQVR4nO3BAQ0AAADCoPdPbQ8HFAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA8GadCAABYe850QAAAABJRU5ErkJggg%3D%3D" alt="Image%20result%20for%20red"/>


It seems that this regression was introduced in R65, here:
https://chromium.googlesource.com/chromium/src/+/01c25d47d2d22456368363e576083d766eedf8f6

This affects ARC: Copy & Paste from Chrome to Android is broken.