Add --idl-methods <filepath> parameter for skipping renaming of IDL methods.

tools/clang/rewrite_to_chrome_style/tests/blocked_methods.txt

Index: tools/clang/rewrite_to_chrome_style/tests/blocked_methods.txt
diff --git a/tools/clang/rewrite_to_chrome_style/tests/blocked_methods.txt b/tools/clang/rewrite_to_chrome_style/tests/blocked_methods.txt
new file mode 100644
index 0000000000000000000000000000000000000000..81d59898560d6b0f3f1b46c1c09a3ab95b67b1d9
--- /dev/null
+++ b/tools/clang/rewrite_to_chrome_style/tests/blocked_methods.txt
@@ -0,0 +1,16 @@
+# Test input file for --method-blocklist parameter.
+
+# Blank line below:
+
+# Line with whitespace only below:
+    
+IdlTestClass:::idlTestMethodNoParams:::0
+IdlTestClass:::idlTestMethodOneParam:::1
+IdlTestClass:::idlTestMethodTwoOrThreeParams:::2
+IdlTestClass:::idlTestMethodTwoOrThreeParams:::3
+IdlTestClass:::idlTemplateMethod:::1
+IdlTestClass:::path:::0
+IdlTestClass:::idlOptionalArgsPass:::0
+IdlTestClass:::idlOptionalArgsStillTooMany:::0
+IdlTestClass:::idlOptionalArgsTooLittle:::2
+IdlTemplateClass:::idlTestMethod:::1