Reduce namespace pollution.

This leaves us with just the mspace stuff and three libdex functions to clean
up. We deliberately expose the JII API, and I don't think there's anything we
can really do about the art_..._from_code stuff (and at least that starts with
"art_").

Change-Id: I77e58e8330cd2afeb496642302dfe3311e68091a
diff --git a/src/compiler/codegen/arm/ArchUtility.cc b/src/compiler/codegen/arm/ArchUtility.cc
index 5e8fa20..c9a30fd 100644
--- a/src/compiler/codegen/arm/ArchUtility.cc
+++ b/src/compiler/codegen/arm/ArchUtility.cc
@@ -20,6 +20,8 @@
 
 #include <string>
 
+namespace art {
+
 static const char* coreRegNames[16] = {
     "r0",
     "r1",
@@ -309,7 +311,7 @@
     switch(lir->opcode) {
         case kArmPseudoMethodEntry:
             LOG(INFO) << "-------- method entry " <<
-                art::PrettyMethod(cUnit->method_idx, *cUnit->dex_file);
+                PrettyMethod(cUnit->method_idx, *cUnit->dex_file);
             break;
         case kArmPseudoMethodExit:
             LOG(INFO) << "-------- Method_Exit";
@@ -413,7 +415,7 @@
 {
     LOG(INFO) << "/*";
     LOG(INFO) << "Dumping LIR insns for "
-        << art::PrettyMethod(cUnit->method_idx, *cUnit->dex_file);
+        << PrettyMethod(cUnit->method_idx, *cUnit->dex_file);
     LIR* lirInsn;
     ArmLIR* armLIR;
     int insnsSize = cUnit->insnsSize;
@@ -447,7 +449,7 @@
             armLIR->generic.offset, armLIR->generic.offset, armLIR->operands[0]);
     }
 
-    const art::DexFile::MethodId& method_id =
+    const DexFile::MethodId& method_id =
         cUnit->dex_file->GetMethodId(cUnit->method_idx);
     std::string signature(cUnit->dex_file->GetMethodSignature(method_id));
     std::string name(cUnit->dex_file->GetMethodName(method_id));
@@ -467,3 +469,5 @@
         LOG(INFO) <<"    };\n\n";
     }
 }
+
+}  // namespace art