ValidationBubbleInRenderer: Update an icon image.

Add some shadow to input_alert.svg in order to match to input_alert.png.

Bug: 739091
Change-Id: I4dcb0617180fba917be85151601722f5e1cb40e9
Reviewed-on: https://chromium-review.googlesource.com/566790Reviewed-by: Keishi Hattori <keishi@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485603}

third_party/WebKit/Source/core/html/forms/resources/input_alert.svg

@@ -4,7 +4,19 @@
      found in the LICENSE file. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="23" height="23" viewBox="0 0 47 47" id="icon">
 <rect x="0" y="0" width="47" height="47" rx="4" ry="4" fill="#ffa300"/>
+
+<rect x="19" y="10" width="9" height="15" fill="#ffbc4f" />
 <rect x="20" y="10" width="7" height="15" fill="#ffffff" />
+<rect x="20" y="9" width="7" height="1" fill="#ffb53d" />
+<rect x="20" y="25" width="7" height="1" fill="#ffd6af" />
+<rect x="20" y="26" width="7" height="1" fill="#ff7e00" />
+
+<defs>
+<linearGradient id="g1" x1="0" y1="0" x2="0" y2="1">
+<stop offset="0%" stop-color="#ffb53d" />
+<stop offset="100%" stop-color="#ff7e00" />
+</linearGradient>
+</defs>
+<circle cx="23.5" cy="33" r="4.5" fill="url(#g1)"/>
 <circle cx="23.5" cy="33" r="3.5" fill="#ffffff"/>
-<!-- TODO(tkent): Add some shadow. -->
 </svg>