Revert of Accessibility: Ignore all anonymous blocks

Revert of Accessibility: Ignore all anonymous blocks (patchset #15 id:280001 of https://codereview.chromium.org/2387533003/ )

Reason for revert:
crbug.com/658045

Original issue's description:
> Accessibility: Ignore all anonymous blocks
> 
> Anonymous blocks are an implementation detail of the
> Blink layout tree. They're surprising and not useful in
> the accessibility tree. Get rid of them by marking them
> all as ignored.
> 
> While it may seem counterintuitive, this is actually
> part of a longer-term plan to get rid of the idea of
> ignoring nodes for accessibility, this will bring us
> closer to just exposing the DOM tree plus generated
> content, like FIrefox and IE do.
> 
> The code change here is tiny, most of the change is
> rebasing or updating dozens and dozens of affected
> tests. I deleted a couple of tests that specifically
> tested corner cases involving anonymous blocks;
> the whole point of this change is to not make this a
> special case anymore.
> 
> Also updates this script, designed to automatically
> pull test output from try servers to a local change:
> 
> tools/accessibility/rebase_dump_accessibility_tree_test.py
> 
> BUG=651614
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

TBR=aboxhall@chromium.org,dmazzoni@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=651614, 658045

[David Tseng, 2016-10-20 22:36:45]

Created Revert of Accessibility: Ignore all anonymous blocks

[David Tseng, 2016-10-20 22:37:36]

Description was changed from

==========
Revert of Accessibility: Ignore all anonymous blocks (patchset #15 id:280001 of
https://codereview.chromium.org/2387533003/ )

Reason for revert:
crbug.com/658045

Original issue's description:
> Accessibility: Ignore all anonymous blocks
> 
> Anonymous blocks are an implementation detail of the
> Blink layout tree. They're surprising and not useful in
> the accessibility tree. Get rid of them by marking them
> all as ignored.
> 
> While it may seem counterintuitive, this is actually
> part of a longer-term plan to get rid of the idea of
> ignoring nodes for accessibility, this will bring us
> closer to just exposing the DOM tree plus generated
> content, like FIrefox and IE do.
> 
> The code change here is tiny, most of the change is
> rebasing or updating dozens and dozens of affected
> tests. I deleted a couple of tests that specifically
> tested corner cases involving anonymous blocks;
> the whole point of this change is to not make this a
> special case anymore.
> 
> Also updates this script, designed to automatically
> pull test output from try servers to a local change:
> 
> tools/accessibility/rebase_dump_accessibility_tree_test.py
> 
> BUG=651614
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

TBR=aboxhall@chromium.org,dmazzoni@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=651614
==========

to

==========
Revert of Accessibility: Ignore all anonymous blocks (patchset #15 id:280001 of
https://codereview.chromium.org/2387533003/ )

Reason for revert:
crbug.com/658045

Original issue's description:
> Accessibility: Ignore all anonymous blocks
> 
> Anonymous blocks are an implementation detail of the
> Blink layout tree. They're surprising and not useful in
> the accessibility tree. Get rid of them by marking them
> all as ignored.
> 
> While it may seem counterintuitive, this is actually
> part of a longer-term plan to get rid of the idea of
> ignoring nodes for accessibility, this will bring us
> closer to just exposing the DOM tree plus generated
> content, like FIrefox and IE do.
> 
> The code change here is tiny, most of the change is
> rebasing or updating dozens and dozens of affected
> tests. I deleted a couple of tests that specifically
> tested corner cases involving anonymous blocks;
> the whole point of this change is to not make this a
> special case anymore.
> 
> Also updates this script, designed to automatically
> pull test output from try servers to a local change:
> 
> tools/accessibility/rebase_dump_accessibility_tree_test.py
> 
> BUG=651614
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

TBR=aboxhall@chromium.org,dmazzoni@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=651614,658045
==========

[David Tseng, 2016-10-20 22:37:44]

The CQ bit was checked by dtseng@chromium.org

[commit-bot: I haz the power, 2016-10-20 22:38:30]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-21 00:20:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-21 00:20:55]

Failed to apply patch for
chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs:
While running git apply --index -3 -p1;
  <stdin>:12: trailing whitespace.
        
  <stdin>:13: trailing whitespace.
       
  <stdin>:22: trailing whitespace.
      
  error: patch failed:
chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs:325
  Falling back to three-way merge...
  Applied patch to
'chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs'
with conflicts.
  U
chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
  warning: 3 lines add whitespace errors.

Patch:      
chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
Index:
chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
diff --git
a/chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
b/chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
index
584fd8064f4b9b8fb76800bfd535feb36242c5e0..534079fb0947c80c080cb3bdfae27530d5467624
100644
---
a/chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
+++
b/chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_test.extjs
@@ -260,8 +260,8 @@
           {value: undefined, index: 0}, {value: undefined, index: 5}],
   ], this.RANGE);
 });
-
-
+      
+     
 TEST_F('CursorsTest', 'LineRange', function() {
   this.runCursorMovesOnDocument(this.simpleDoc, [
         [LINE, FORWARD, {value: 'end', index: 0}, {value: 'end', index: 3}],
@@ -289,7 +289,7 @@
     cursor = cursor.move(NODE, DIRECTIONAL, BACKWARD);
     assertEquals('staticText', cursor.node.role);
     assertEquals('start diff line', cursor.node.name);
-
+    
     assertEquals('inlineTextBox', cursor.node.firstChild.role);
     assertEquals('start ', cursor.node.firstChild.name);
     assertEquals('diff ', cursor.node.firstChild.nextSibling.name);
@@ -325,7 +325,7 @@
 
 TEST_F('CursorsTest', 'SingleDocSelection', function() {
   this.runWithLoadedTree(function() {/*!
-    <p><a href="google.com">google home page</a></p>
+    <a href="google.com">google home page</a>
     <p>some more text</p>
     <p>end of text</p>
   */},