refactor(compiler): renames

- `NgHost` to `CompilerHost`
- `AotCompilerHost.resolveFileToImport` to `AotCompilerHost.fileNameToModuleName`
- `AotCompilerHoset.resolveImportToFile` to `AotCompilerHost.moduleNameToFileName`

modules/@angular/compiler/test/aot/static_reflector_spec.ts

@@ -511,12 +511,12 @@ class MockAotCompilerHost implements AotCompilerHost {
 
   loadResource(filePath: string): Promise<string> { throw new Error('Should not be called!'); }
 
-  resolveFileToImport(importedFilePath: string, containingFilePath: string): string {
+  fileNameToModuleName(importedFilePath: string, containingFilePath: string): string {
     throw new Error('Should not be called!');
   }
 
   // In tests, assume that symbols are not re-exported
-  resolveImportToFile(modulePath: string, containingFile?: string): string {
+  moduleNameToFileName(modulePath: string, containingFile?: string): string {
     function splitPath(path: string): string[] { return path.split(/\/|\\/g); }
 
     function resolvePath(pathParts: string[]): string {

modules/@angular/compiler/test/output/output_emitter_util.ts

@@ -253,7 +253,7 @@ function createOperatorFn(op: o.BinaryOperator) {
 }
 
 export class SimpleJsImportGenerator implements ImportResolver {
-  resolveFileToImport(importedUrlStr: string, moduleUrlStr: string): string {
+  fileNameToModuleName(importedUrlStr: string, moduleUrlStr: string): string {
     return importedUrlStr;
   }
 }