add predefines to doxygen

Doxyfile

Index: Doxyfile
diff --git a/Doxyfile b/Doxyfile
index c9da93981b8309750792b93022821f1ada3f713c..167e8fa6cc21ba24ffe74faa79b5f04f73250f6e 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1945,7 +1945,12 @@ INCLUDE_FILE_PATTERNS  =
 # recursively expanded use the := operator instead of the = operator.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-PREDEFINED             =
+PREDEFINED             = "DALLOW_DUMP=1" \
+                         "DALLOW_LLVM_CL=1" \
+                         "DALLOW_LLVM_IR=1" \
+                         "DALLOW_LLVM_IR_AS_INPUT=1" \
+                         "DALLOW_MINIMAL_BUILD=0" \
+                         "DPNACL_BROWSER_TRANSLATOR=0"
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The
@@ -2311,3 +2316,13 @@ GENERATE_LEGEND        = YES
 # This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_CLEANUP            = YES
+
+CLANG_ASSISTED_PARSING = NO
+
+CLANG_OPTIONS = "-std=c++11" \
+                "-DALLOW_DUMP=1" \
+                "-DALLOW_LLVM_CL=1" \
+                "-DALLOW_LLVM_IR=1" \
+                "-DALLOW_LLVM_IR_AS_INPUT=1" \
+                "-DALLOW_MINIMAL_BUILD=0" \
+                "-DPNACL_BROWSER_TRANSLATOR=0"