Improve <webview> autosize:

chrome/test/data/extensions/platform_apps/web_view/shim/main.js

Index: chrome/test/data/extensions/platform_apps/web_view/shim/main.js
diff --git a/chrome/test/data/extensions/platform_apps/web_view/shim/main.js b/chrome/test/data/extensions/platform_apps/web_view/shim/main.js
index 6234971e0ad3d5c2de0e1959ca2610fa8dd07a80..b76cd85b9a2d0316d1c5d845afa6bcb0a207d1b0 100644
--- a/chrome/test/data/extensions/platform_apps/web_view/shim/main.js
+++ b/chrome/test/data/extensions/platform_apps/web_view/shim/main.js
@@ -184,14 +184,13 @@ function testAutosizeWithPartialAttributes() {
         embedder.test.assertEq(640, e.newWidth);
 
         // Tests when minwidth > maxwidth, minwidth = maxwidth.
-        webview.maxheight = null;
         webview.minwidth = 800;
-        webview.minheight = 800;
         break;
       case 3:
-        // Expect 700X480
+        // Expect 700X?
         embedder.test.assertEq(700, e.newWidth);
-        embedder.test.assertEq(480, e.newHeight);
+        embedder.test.assertTrue(e.newHeight >= 200);
+        embedder.test.assertTrue(e.newHeight <= 600);
 
         // Remove maxwidth and make sure the size returns to plugin size.
         webview.removeAttribute('maxwidth');
@@ -199,7 +198,8 @@ function testAutosizeWithPartialAttributes() {
       case 4:
         // Expect original size, 640x480.
         embedder.test.assertEq(640, e.newWidth);
-        embedder.test.assertEq(480, e.newHeight);
+        embedder.test.assertTrue(e.newHeight >= 200);
+        embedder.test.assertTrue(e.newHeight <= 600);
 
         embedder.test.succeed();
         break;