Remove --pdf option as it can now be controlled by --config

R=borenet@google.com, bsalomon@google.com

Author: djsollen@google.com

Review URL: https://codereview.chromium.org/25859006

git-svn-id: http://skia.googlecode.com/svn/trunk@11666 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index 99cd2a4..e29a1d8 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -1412,7 +1412,6 @@
               "pixel mismatches into this directory.");
 DEFINE_string(modulo, "", "[--modulo <remainder> <divisor>]: only run tests for which "
               "testIndex %% divisor == remainder.");
-DEFINE_bool(pdf, true, "Exercise the pdf rendering test pass.");
 DEFINE_bool(pipe, false, "Exercise the SkGPipe replay test pass.");
 DEFINE_string2(readPath, r, "", "Read reference images from this dir, and report "
                "any differences between those and the newly generated ones.");
@@ -1528,9 +1527,6 @@
         // If any of these were skipped on a per-GM basis, record them as
         // kIntentionallySkipped.
         if (kPDF_Backend == config.fBackend) {
-            if (!FLAGS_pdf) {
-                continue;
-            }
             if (gmFlags & GM::kSkipPDF_Flag) {
                 gmmain.RecordTestResults(kIntentionallySkipped_ErrorType, shortNamePlusConfig,
                                          renderModeDescriptor);