Utilize TestContentClient in RenderViewTest as resources are being migrated to using grd system.

Blink is about to use blink_resources.grd for the inline resources of user agent stylesheets.
This removes the dependency upon using make-file-arrays.py which embeds these resources as strings.

This patch instantiates TestContentClient which does all the plumbing required for various test targets in content.
As the resources are being moved into blink_resources.grd, this generates blink_resources.pak.
This pak doesn't exists as a separate pak file but its repacked into "content_shell.pak".

This blink side changes were reverted here https://codereview.chromium.org/567073004/

The reason for reverting: Breaking quite a few browser_tests and content_browsertests across multiple platforms.

BUG=312586

Review URL: https://codereview.chromium.org/567153002

Cr-Commit-Position: refs/heads/master@{#295071}

chrome/browser_tests.isolate

@@ -92,6 +92,7 @@
       'variables': {
         'isolate_dependency_tracked': [
           '<(PRODUCT_DIR)/clearkeycdmadapter.plugin',
+          '<(PRODUCT_DIR)/content_shell.pak',
           '<(PRODUCT_DIR)/libclearkeycdm.dylib',
           '<(PRODUCT_DIR)/osmesa.so',
           '<(PRODUCT_DIR)/ppapi_nacl_tests_glibc_x32.nexe',
@@ -141,6 +142,7 @@
     ['chromeos==1', {
       'variables': {
         'isolate_dependency_tracked': [
+          '<(PRODUCT_DIR)/content_shell.pak',
           '<(PRODUCT_DIR)/keyboard_resources.pak',
           '<(PRODUCT_DIR)/libexif.so',
           '<(PRODUCT_DIR)/nacl_helper',

content/content_browsertests.isolate

@@ -10,6 +10,20 @@
         ],
       },
     }],
+    ['chromeos==1', {
+      'variables': {
+        'isolate_dependency_tracked': [
+          '<(PRODUCT_DIR)/content_shell.pak',
+        ],
+      },
+    }],
+    ['OS=="mac"', {
+      'variables': {
+        'isolate_dependency_tracked': [
+          '<(PRODUCT_DIR)/content_shell.pak',
+        ],
+      },
+    }],
     ['OS=="android" or OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'isolate_dependency_untracked': [

content/public/test/render_view_test.cc

@@ -22,6 +22,7 @@
 #include "content/renderer/renderer_main_platform_delegate.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
 #include "content/test/mock_render_process.h"
+#include "content/test/test_content_client.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/web/WebHistoryItem.h"
@@ -391,7 +392,7 @@ blink::WebWidget* RenderViewTest::GetWebWidget() {
 
 
 ContentClient* RenderViewTest::CreateContentClient() {
-  return new ContentClient;
+  return new TestContentClient;
 }
 
 ContentBrowserClient* RenderViewTest::CreateContentBrowserClient() {