gpu_test_expectations: Fix a -Wheader-hygiene

src/tests/third_party/gpu_test_expectations/HowToMakeChanges.md

@@ -5,7 +5,7 @@ will allow us to merge Chromium changes easily in our ```gpu_test_expectations``
 In order to make a change to this directory, do the following:
 
  * copy the directory somewhere like in ```gpu_test_expectations_reverted```
- * in ```gpu_test_expectations_reverted``` run ```patch -p 1 -R angle-mods.patch```
+ * in ```gpu_test_expectations_reverted``` run ```patch -p 1 -R < angle-mods.patch```
  * do your changes in ```gpu_test_expectations```
  * delete angle-mods.path in both directories
  * run ```diff -rupN gpu_test_expectations_reverted gpu_test_expectations > angle-mods.patch```

src/tests/third_party/gpu_test_expectations/angle_config.h

@@ -21,17 +21,27 @@
 #define DCHECK_NE(A,B) ASSERT((A) != (B))
 #define DCHECK(X) ASSERT(X)
 #define LOG(X) std::cerr
-#define StringPrintf FormatString
 
 #define GPU_EXPORT
-#define base
 
 typedef int32_t int32;
 typedef uint32_t uint32;
 typedef int64_t int64;
 typedef uint64_t uint64;
 
-using namespace angle;
+// Shim Chromium's base by importing functions in the bsae namespace.
+namespace base
+{
+    using angle::HexStringToUInt;
+    using angle::ReadFileToString;
+    using angle::SplitString;
+    using angle::SplitStringAlongWhitespace;
+
+    // StringPrintf is called differently in ANGLE but using cannot change
+    // the name of the imported function. Use a define to change the name.
+    using ::FormatString;
+    #define StringPrintf FormatString
+}
 
 // TODO(jmadill): other platforms
 #if defined(_WIN32) || defined(_WIN64)

src/tests/third_party/gpu_test_expectations/gpu_test_expectations_parser.cc

@@ -6,6 +6,8 @@
 
 #include "common/angleutils.h"
 
+namespace base {
+
 bool StartsWithASCII(const std::string& str,
                      const std::string& search,
                      bool case_sensitive) {
@@ -32,6 +34,8 @@ bool LowerCaseEqualsASCII(const std::string& a, const char* b) {
   return DoLowerCaseEqualsASCII(a.begin(), a.end(), b);
 }
 
+} // namespace base
+
 namespace gpu {
 
 namespace {