Disable VizHitTestDrawQuad feature in one of the test configs.

To prepare for VizHitTestDrawQuad finch trial in beta, we need to add a
field trial config which would enable VizHitTestDrawQuad feature by
default in all perf bots and browser tests [1]. This CL explicitly
disables VizHitTestDrawQuad feature in one of the test configs in
SitePerProcessHitTestBrowsertest and PDFExtensionHitTestTest so we
can still test both with and without VizHitTestDrawQuad feature before
VizHitTestDrawQuad is turned on by default.

[1] https://chromium-review.googlesource.com/c/chromium/src/+/1053907

Bug: 804888
Change-Id: I42265f3c6249eb1c2b1c5c74a2e2b2fddfa35455
Reviewed-on: https://chromium-review.googlesource.com/1059699Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Ria Jiang <riajiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558769}

chrome/browser/pdf/pdf_extension_test.cc

@@ -365,6 +365,8 @@ class PDFExtensionHitTestTest : public PDFExtensionTest,
     PDFExtensionTest::SetUpCommandLine(command_line);
     if (GetParam()) {
       feature_list_.InitAndEnableFeature(features::kEnableVizHitTestDrawQuad);
+    } else {
+      feature_list_.InitAndDisableFeature(features::kEnableVizHitTestDrawQuad);
     }
   }
 

content/browser/site_per_process_hit_test_browsertest.cc

@@ -485,6 +485,8 @@ class SitePerProcessHitTestBrowserTest
     } else if (std::get<0>(GetParam()) == 2) {
       feature_list_.InitAndEnableFeature(
           features::kEnableVizHitTestSurfaceLayer);
+    } else {
+      feature_list_.InitAndDisableFeature(features::kEnableVizHitTestDrawQuad);
     }
   }