Closure: more v2-specific changes, typo and rendering fixes

R=dpapad@chromium.org
BUG=585553
NOTRY=true

Review URL: https://codereview.chromium.org/1780873002

Cr-Commit-Position: refs/heads/master@{#380437}

docs/closure_compilation.md

@@ -18,7 +18,7 @@ On Mac or Windows, visit:
 We use GYP and ninja as our build system. To generate the ninja files from GYP:
 
 ```shell
-# notice the 2 in compiled_resources.gyp
+# notice the 2 in compiled_resources2.gyp
 GYP_GENERATORS=ninja tools/gyp/gyp --depth . third_party/closure_compiler/compiled_resources2.gyp
 ```
 
@@ -99,29 +99,23 @@ alert(mensa);  // '100 IQ50' instead of 150
 
 In order to check that our code acts as we'd expect, we can create a
 
-    my_project/compiled_resources.gyp
+    my_project/compiled_resources2.gyp
 
 with the contents:
 
 ```
-# Copyright 2015 The Chromium Authors. All rights reserved.
+# Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   'targets': [
     {
       'target_name': 'my_file',  # file name without ".js"
-
-      'variables': {  # Only use if necessary (no need to specify empty lists).
-        'depends': [
-          'other_file.js',  # or 'other_project/compiled_resources.gyp:target',
-        ],
-        'externs': [
-          '<(CLOSURE_DIR)/externs/any_needed_externs.js'  # e.g. chrome.send(), chrome.app.window, etc.
-        ],
-      },
-
-      'includes': ['../third_party/closure_compiler/compile_js.gypi'],
+      'dependencies': [  # No need to specify empty lists.
+        '../compiled_resources2.gyp:other_file',
+        '<(EXTERNS_GYP):any_needed_externs'  # e.g. chrome.send(), chrome.app.window, etc.
+      ],
+      'includes': ['../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }
@@ -154,7 +148,7 @@ like this:
       'target_name': 'compile_all_resources',
       'dependencies': [
          # ... other projects ...
-++       '../my_project/compiled_resources.gyp:*',
+++       '../my_project/compiled_resources2.gyp:*',
       ],
     }
   ]
@@ -172,7 +166,7 @@ Compiled JavaScript is output in
 map for use in debugging. In order to use the compiled JavaScript, we can create
 a
 
-    my_project/my_project_resources.gpy
+    my_project/my_project_resources.gyp
 
 with the contents:
 
@@ -225,6 +219,7 @@ with the contents:
 ```
 
 In your C++, the resource can be retrieved like this:
+
 ```
 base::string16 my_script =
     base::UTF8ToUTF16(
@@ -287,6 +282,7 @@ my_project/compiled_resources.gyp
 ```
 
 with contents similar to this:
+
 ```
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be